diff --git a/ChangeLog.adoc b/ChangeLog.adoc
index 0d9636b08..e00c35565 100644
--- a/ChangeLog.adoc
+++ b/ChangeLog.adoc
@@ -25,6 +25,7 @@ New features::
   * core: add option "add" in command /buffer (issue #1113)
   * core: add option weechat.completion.partial_completion_templates to force partial completion on specific templates
   * api: add hashtable with variables in plugin structure
+  * irc: add server option "split_msg_max_length"
   * logger: add option logger.look.backlog_conditions (issue #1132)
   * scripts: add "eval" option in script commands and info "xxx_eval" (python, perl, ruby, lua and guile) (issue #128)
   * scripts: add infos "xxx_interpreter" and "xxx_version" in script plugins (issue #1075)
diff --git a/doc/de/autogen/plugin_api/infos_hashtable.adoc b/doc/de/autogen/plugin_api/infos_hashtable.adoc
index f58d66a4e..3ed0dd57f 100644
--- a/doc/de/autogen/plugin_api/infos_hashtable.adoc
+++ b/doc/de/autogen/plugin_api/infos_hashtable.adoc
@@ -8,6 +8,6 @@
 
 | irc | irc_message_parse | Parse eine IRC Nachricht | "message": IRC Nachricht, "server": Servername (optional) | "tags": Tags, "message_without_tags": Nachrichten ohne Tags, "nick": Nick, "host": Host, "command": Befehl, "channel": Channel, "arguments": Argumente (schließt Channel ein), "text": Text (zum Beispiel eine Nachricht von einem User), "pos_command": Index der "command" Nachricht ("-1" falls "command" nicht gefunden wird), "pos_arguments": Index der "arguments" Nachricht ("-1" falls "arguments" nicht gefunden wird), "pos_channel": Index der "channel" Nachricht ("-1" falls "channel" nicht gefunden wird),"pos_text": Index für "text" Nachricht ("-1" falls "text" nicht gefunden wird)
 
-| irc | irc_message_split | dient zum Aufteilen einer überlangen IRC Nachricht (in maximal 512 Bytes große Nachrichten) | "message": IRC Nachricht, "server": Servername (optional) | "msg1" ... "msgN": Nachrichten die versendet werden sollen (ohne abschließendes "\r\n"), "args1" ... "argsN": Argumente für Nachrichten, "count": Anzahl der Nachrichten
+| irc | irc_message_split | split an IRC message (to fit in 512 bytes by default) | "message": IRC Nachricht, "server": Servername (optional) | "msg1" ... "msgN": Nachrichten die versendet werden sollen (ohne abschließendes "\r\n"), "args1" ... "argsN": Argumente für Nachrichten, "count": Anzahl der Nachrichten
 
 |===
diff --git a/doc/de/autogen/user/irc_options.adoc b/doc/de/autogen/user/irc_options.adoc
index 2a655e470..8d283506a 100644
--- a/doc/de/autogen/user/irc_options.adoc
+++ b/doc/de/autogen/user/irc_options.adoc
@@ -704,6 +704,12 @@
 ** Werte: beliebige Zeichenkette
 ** Standardwert: `+""+`
 
+* [[option_irc.server_default.split_msg_max_length]] *irc.server_default.split_msg_max_length*
+** Beschreibung: pass:none[split outgoing IRC messages to fit in this number of chars; the default value is 512, this is a safe and recommended value); value 0 disables the split (not recommended, unless you know what you do); allowed values are 0 or any integer between 128 and 4096; this option should be changed only on non-standard IRC servers, for example gateways like bitlbee]
+** Typ: integer
+** Werte: 0 .. 4096
+** Standardwert: `+512+`
+
 * [[option_irc.server_default.ssl]] *irc.server_default.ssl*
 ** Beschreibung: pass:none[Server über SSL ansprechen]
 ** Typ: boolesch
diff --git a/doc/en/autogen/plugin_api/infos_hashtable.adoc b/doc/en/autogen/plugin_api/infos_hashtable.adoc
index b1bbc605c..b13412c36 100644
--- a/doc/en/autogen/plugin_api/infos_hashtable.adoc
+++ b/doc/en/autogen/plugin_api/infos_hashtable.adoc
@@ -8,6 +8,6 @@
 
 | irc | irc_message_parse | parse an IRC message | "message": IRC message, "server": server name (optional) | "tags": tags, "message_without_tags": message without the tags, "nick": nick, "host": host, "command": command, "channel": channel, "arguments": arguments (includes channel), "text": text (for example user message), "pos_command": index of "command" message ("-1" if "command" was not found), "pos_arguments": index of "arguments" message ("-1" if "arguments" was not found), "pos_channel": index of "channel" message ("-1" if "channel" was not found), "pos_text": index of "text" message ("-1" if "text" was not found)
 
-| irc | irc_message_split | split an IRC message (to fit in 512 bytes) | "message": IRC message, "server": server name (optional) | "msg1" ... "msgN": messages to send (without final "\r\n"), "args1" ... "argsN": arguments of messages, "count": number of messages
+| irc | irc_message_split | split an IRC message (to fit in 512 bytes by default) | "message": IRC message, "server": server name (optional) | "msg1" ... "msgN": messages to send (without final "\r\n"), "args1" ... "argsN": arguments of messages, "count": number of messages
 
 |===
diff --git a/doc/en/autogen/user/irc_options.adoc b/doc/en/autogen/user/irc_options.adoc
index 95be5e02d..673fa315a 100644
--- a/doc/en/autogen/user/irc_options.adoc
+++ b/doc/en/autogen/user/irc_options.adoc
@@ -704,6 +704,12 @@
 ** values: any string
 ** default value: `+""+`
 
+* [[option_irc.server_default.split_msg_max_length]] *irc.server_default.split_msg_max_length*
+** description: pass:none[split outgoing IRC messages to fit in this number of chars; the default value is 512, this is a safe and recommended value); value 0 disables the split (not recommended, unless you know what you do); allowed values are 0 or any integer between 128 and 4096; this option should be changed only on non-standard IRC servers, for example gateways like bitlbee]
+** type: integer
+** values: 0 .. 4096
+** default value: `+512+`
+
 * [[option_irc.server_default.ssl]] *irc.server_default.ssl*
 ** description: pass:none[use SSL for server communication]
 ** type: boolean
diff --git a/doc/en/weechat_plugin_api.en.adoc b/doc/en/weechat_plugin_api.en.adoc
index 1c2b6fd67..5425524c4 100644
--- a/doc/en/weechat_plugin_api.en.adoc
+++ b/doc/en/weechat_plugin_api.en.adoc
@@ -9223,11 +9223,13 @@ List of signals sent by WeeChat and plugins:
 | irc | xxx,irc_out1_yyy ^(1)^ +
   _(WeeChat ≥ 0.3.7)_ |
   String: message. |
-  IRC message sent to server (before automatic split to fit in 512 bytes).
+  IRC message sent to server before automatic split
+  (to fit in 512 bytes by default).
 
 | irc | xxx,irc_out_yyy ^(1)^ |
   String: message. |
-  IRC message sent to server (after automatic split to fit in 512 bytes).
+  IRC message sent to server after automatic split
+  (to fit in 512 bytes by default).
 
 | irc | xxx,irc_outtags_yyy ^(1)^ +
   _(WeeChat ≥ 0.3.4)_ |
@@ -10615,14 +10617,14 @@ List of modifiers used by WeeChat and plugins:
 | irc_out1_xxx ^(1)^ +
   _(WeeChat ≥ 0.3.7)_ |
   Server name |
-  Content of message about to be sent to IRC server (before automatic split to
-  fit in 512 bytes). |
+  Content of message about to be sent to IRC server before automatic split
+  (to fit in 512 bytes by default). |
   New content of message.
 
 | irc_out_xxx ^(1)^ |
   Server name |
-  Content of message about to be sent to IRC server (after automatic split to
-  fit in 512 bytes). |
+  Content of message about to be sent to IRC server after automatic split
+  (to fit in 512 bytes by default). |
   New content of message.
 
 | color_decode_ansi +
diff --git a/doc/fr/autogen/plugin_api/infos_hashtable.adoc b/doc/fr/autogen/plugin_api/infos_hashtable.adoc
index 2f96dfe32..d5bc57b5c 100644
--- a/doc/fr/autogen/plugin_api/infos_hashtable.adoc
+++ b/doc/fr/autogen/plugin_api/infos_hashtable.adoc
@@ -8,6 +8,6 @@
 
 | irc | irc_message_parse | analyse un message IRC | "message" : message IRC, "server" : nom du serveur (optionnel) | "tags" : étiquettes, "message_without_tags" : message sans les étiquettes, "nick" : pseudo, "host" : nom d'hôte, "command" : commande, "channel" : canal, "arguments" : paramètres (inclut le canal), "text" : texte (par exemple message utilisateur), "pos_command" : index de "command" dans le message ("-1" si "command" n'a pas été trouvé), "pos_arguments" : index de "arguments" dans le message ("-1" si "arguments" n'a pas été trouvé), "pos_channel" : index de "channel" dans le message ("-1" si "channel" n'a pas été trouvé), "pos_text" : index de "text" dans le message ("-1" si "text" n'a pas été trouvé)
 
-| irc | irc_message_split | découper un message IRC (pour tenir dans les 512 octets) | "message" : message IRC, "server" : nom du serveur (optionnel) | "msg1" ... "msgN" : messages à envoyer (sans le "\r\n" final), "args1" ... "argsN" : paramètres des messages, "count" : nombre de messages
+| irc | irc_message_split | découper un message IRC (pour tenir dans les 512 octets par défaut) | "message" : message IRC, "server" : nom du serveur (optionnel) | "msg1" ... "msgN" : messages à envoyer (sans le "\r\n" final), "args1" ... "argsN" : paramètres des messages, "count" : nombre de messages
 
 |===
diff --git a/doc/fr/autogen/user/irc_options.adoc b/doc/fr/autogen/user/irc_options.adoc
index bbdfc5696..260b4138f 100644
--- a/doc/fr/autogen/user/irc_options.adoc
+++ b/doc/fr/autogen/user/irc_options.adoc
@@ -704,6 +704,12 @@
 ** valeurs: toute chaîne
 ** valeur par défaut: `+""+`
 
+* [[option_irc.server_default.split_msg_max_length]] *irc.server_default.split_msg_max_length*
+** description: pass:none[découper les messages IRC sortants pour tenir dans ce nombre de caractères ; la valeur par défaut est 512, c'est une valeur sûre et recommandée ; la valeur 0 désactive le découpage (non recommandé, sauf si vous êtes sûr de ce que vous faites) ; les valeurs autorisées sont 0 ou tout entier compris entre 128 et 4096 ; cette option devrait être changée seulement sur les serveurs IRC non standards, par exemple sur les passerelles comme bitlbee]
+** type: entier
+** valeurs: 0 .. 4096
+** valeur par défaut: `+512+`
+
 * [[option_irc.server_default.ssl]] *irc.server_default.ssl*
 ** description: pass:none[utiliser SSL pour la communication avec le serveur]
 ** type: booléen
diff --git a/doc/fr/weechat_plugin_api.fr.adoc b/doc/fr/weechat_plugin_api.fr.adoc
index 45c99ea2a..cba0c8041 100644
--- a/doc/fr/weechat_plugin_api.fr.adoc
+++ b/doc/fr/weechat_plugin_api.fr.adoc
@@ -9404,13 +9404,13 @@ Liste des signaux envoyés par WeeChat et les extensions :
 | irc | xxx,irc_out1_yyy ^(1)^ +
   _(WeeChat ≥ 0.3.7)_ |
   Chaîne : message. |
-  Message IRC envoyé au serveur (avant découpage automatique pour tenir dans les
-  512 octets).
+  Message IRC envoyé au serveur avant découpage automatique
+  (pour tenir dans les 512 octets par défaut).
 
 | irc | xxx,irc_out_yyy ^(1)^ |
   Chaîne : message. |
-  Message IRC envoyé au serveur (après découpage automatique pour tenir dans les
-  512 octets).
+  Message IRC envoyé au serveur après découpage automatique
+  (pour tenir dans les 512 octets par défaut).
 
 | irc | xxx,irc_outtags_yyy ^(1)^ +
   _(WeeChat ≥ 0.3.4)_ |
@@ -10831,14 +10831,14 @@ Liste des modificateurs utilisés par WeeChat et les extensions :
 | irc_out1_xxx ^(1)^ +
   _(WeeChat ≥ 0.3.7)_ |
   Nom de serveur |
-  Contenu du message qui va être envoyé au serveur IRC (avant découpage
-  automatique pour tenir dans les 512 octets). |
+  Contenu du message qui va être envoyé au serveur IRC avant découpage automatique
+  (pour tenir dans les 512 octets par défaut). |
   Nouveau contenu du message.
 
 | irc_out_xxx ^(1)^ |
   Nom de serveur |
-  Contenu du message qui va être envoyé au serveur IRC (après découpage
-  automatique pour tenir dans les 512 octets). |
+  Contenu du message qui va être envoyé au serveur IRC après découpage automatique
+  (pour tenir dans les 512 octets par défaut). |
   Nouveau contenu du message.
 
 | color_decode_ansi +
diff --git a/doc/it/autogen/plugin_api/infos_hashtable.adoc b/doc/it/autogen/plugin_api/infos_hashtable.adoc
index 430d0aebc..3c61f008f 100644
--- a/doc/it/autogen/plugin_api/infos_hashtable.adoc
+++ b/doc/it/autogen/plugin_api/infos_hashtable.adoc
@@ -8,6 +8,6 @@
 
 | irc | irc_message_parse | controlla un messaggio IRC | "message": messaggio IRC, "server": nome server (opzionale) | "tags": tags, "message_without_tags": message without the tags, "nick": nick, "host": host, "command": command, "channel": channel, "arguments": arguments (includes channel), "text": text (for example user message), "pos_command": index of "command" message ("-1" if "command" was not found), "pos_arguments": index of "arguments" message ("-1" if "arguments" was not found), "pos_channel": index of "channel" message ("-1" if "channel" was not found), "pos_text": index of "text" message ("-1" if "text" was not found)
 
-| irc | irc_message_split | divide un messaggio IRC (per adattarlo in 512 byte) | "message": messaggio IRC, "server": nome server (opzionale) | "msg1" ... "msgN": messaggio da inviare (senza "\r\n" finale), "args1" ... "argsN": argomenti dei messaggi, "count": numero di messaggi
+| irc | irc_message_split | split an IRC message (to fit in 512 bytes by default) | "message": messaggio IRC, "server": nome server (opzionale) | "msg1" ... "msgN": messaggio da inviare (senza "\r\n" finale), "args1" ... "argsN": argomenti dei messaggi, "count": numero di messaggi
 
 |===
diff --git a/doc/it/autogen/user/irc_options.adoc b/doc/it/autogen/user/irc_options.adoc
index 99d1a2cb3..5543e0b95 100644
--- a/doc/it/autogen/user/irc_options.adoc
+++ b/doc/it/autogen/user/irc_options.adoc
@@ -704,6 +704,12 @@
 ** valori: qualsiasi stringa
 ** valore predefinito: `+""+`
 
+* [[option_irc.server_default.split_msg_max_length]] *irc.server_default.split_msg_max_length*
+** descrizione: pass:none[split outgoing IRC messages to fit in this number of chars; the default value is 512, this is a safe and recommended value); value 0 disables the split (not recommended, unless you know what you do); allowed values are 0 or any integer between 128 and 4096; this option should be changed only on non-standard IRC servers, for example gateways like bitlbee]
+** tipo: intero
+** valori: 0 .. 4096
+** valore predefinito: `+512+`
+
 * [[option_irc.server_default.ssl]] *irc.server_default.ssl*
 ** descrizione: pass:none[usa SSL per le comunicazioni col server]
 ** tipo: bool
diff --git a/doc/it/weechat_plugin_api.it.adoc b/doc/it/weechat_plugin_api.it.adoc
index 3d939232b..f2d5cb166 100644
--- a/doc/it/weechat_plugin_api.it.adoc
+++ b/doc/it/weechat_plugin_api.it.adoc
@@ -9524,14 +9524,18 @@ List of signals sent by WeeChat and plugins:
   utilizzato dal plugin irc, il segnale viene inviato
   anche se il messaggio è stato ignorato).
 
+// TRANSLATION MISSING
 | irc | xxx,irc_out1_yyy ^(1)^ +
   _(WeeChat ≥ 0.3.7)_ |
   String: messaggio. |
-  Messaggio IRC inviato al server (prima della divisione automatica da adattare in 512 byte).
+  IRC message sent to server before automatic split
+  (to fit in 512 bytes by default).
 
+// TRANSLATION MISSING
 | irc | xxx,irc_out_yyy ^(1)^ |
   String: messaggio. |
-  Messaggio IRC inviato al server (dopo la divisione automatica da adattare in 512 byte).
+  IRC message sent to server after automatic split
+  (to fit in 512 bytes by default).
 
 | irc | xxx,irc_outtags_yyy ^(1)^ +
   _(WeeChat ≥ 0.3.4)_ |
@@ -11032,15 +11036,19 @@ List of modifiers used by WeeChat and plugins:
   Contenuto del messaggio ricevuto dal server IRC (dopo la codifica del set caratteri). |
   Nuovo contenuto del messaggio.
 
+// TRANSLATION MISSING
 | irc_out1_xxx ^(1)^ +
   _(WeeChat ≥ 0.3.7)_ |
   Nome server |
-  Contenuto del messaggio che sta per essere inviato al server IRC (prima della divisione automatica da adattare in 512 byte). |
+  Content of message about to be sent to IRC server before automatic split
+  (to fit in 512 bytes by default). |
   Nuovo contenuto del messaggio.
 
+// TRANSLATION MISSING
 | irc_out_xxx ^(1)^ |
   Nome server |
-  Contenuto del messaggio che sta per essere inviato al server IRC (dopo la divisione automatica da adattare in 512 byte). |
+  Content of message about to be sent to IRC server after automatic split
+  (to fit in 512 bytes by default). |
   Nuovo contenuto del messaggio.
 
 // TRANSLATION MISSING
diff --git a/doc/ja/autogen/plugin_api/infos_hashtable.adoc b/doc/ja/autogen/plugin_api/infos_hashtable.adoc
index 7cb8ec3ee..3fd1ae4cb 100644
--- a/doc/ja/autogen/plugin_api/infos_hashtable.adoc
+++ b/doc/ja/autogen/plugin_api/infos_hashtable.adoc
@@ -8,6 +8,6 @@
 
 | irc | irc_message_parse | IRC メッセージを解析 | "message": IRC メッセージ、"server": サーバ名 (任意) | "tags": タグ、"message_without_tags": タグを含まないメッセージ、"nick": ニックネーム、"host": ホスト名、"command": コマンド、"channel": チャンネル、"arguments": 引数 (チャンネルを含む)、"text": テキスト (例えばユーザメッセージ)、"pos_command": "command" メッセージのインデックス ("command" が見つからない場合 "-1")、"pos_arguments": "arguments" メッセージのインデックス ("arguments" が見つからない場合 "-1")、"pos_channel": "channel" メッセージのインデックス ("channel" が見つからない場合 "-1")、"pos_text": "text" メッセージのインデックス ("text" が見つからない場合 "-1")
 
-| irc | irc_message_split | IRC メッセージを分割 (512 バイトに収める) | "message": IRC メッセージ、"server": サーバ名 (任意) | "msg1" ... "msgN": 送信メッセージ (最後の "\r\n" は無し), "args1" ... "argsN": メッセージの引数、"count": メッセージの数
+| irc | irc_message_split | split an IRC message (to fit in 512 bytes by default) | "message": IRC メッセージ、"server": サーバ名 (任意) | "msg1" ... "msgN": 送信メッセージ (最後の "\r\n" は無し), "args1" ... "argsN": メッセージの引数、"count": メッセージの数
 
 |===
diff --git a/doc/ja/autogen/user/irc_options.adoc b/doc/ja/autogen/user/irc_options.adoc
index 69eea6880..8a329e3f6 100644
--- a/doc/ja/autogen/user/irc_options.adoc
+++ b/doc/ja/autogen/user/irc_options.adoc
@@ -704,6 +704,12 @@
 ** 値: 未制約文字列
 ** デフォルト値: `+""+`
 
+* [[option_irc.server_default.split_msg_max_length]] *irc.server_default.split_msg_max_length*
+** 説明: pass:none[split outgoing IRC messages to fit in this number of chars; the default value is 512, this is a safe and recommended value); value 0 disables the split (not recommended, unless you know what you do); allowed values are 0 or any integer between 128 and 4096; this option should be changed only on non-standard IRC servers, for example gateways like bitlbee]
+** タイプ: 整数
+** 値: 0 .. 4096
+** デフォルト値: `+512+`
+
 * [[option_irc.server_default.ssl]] *irc.server_default.ssl*
 ** 説明: pass:none[サーバとの通信に SSL を利用]
 ** タイプ: ブール
diff --git a/doc/ja/weechat_plugin_api.ja.adoc b/doc/ja/weechat_plugin_api.ja.adoc
index eab10469d..b28f2bf65 100644
--- a/doc/ja/weechat_plugin_api.ja.adoc
+++ b/doc/ja/weechat_plugin_api.ja.adoc
@@ -9225,14 +9225,18 @@ WeeChat とプラグインが送信するシグナルのリスト:
   サーバから IRC メッセージを受信 (メッセージを無視する場合でも irc
   プラグインがメッセージを処理した後に、シグナルが送信される)
 
+// TRANSLATION MISSING
 | irc | xxx,irc_out1_yyy ^(1)^ +
   _(WeeChat バージョン 0.3.7 以上で利用可)_ |
   String: メッセージ |
-  サーバに IRC メッセージを送信 (メッセージを 512 バイトに合わせて自動分割する前)
+  IRC message sent to server before automatic split
+  (to fit in 512 bytes by default).
 
+// TRANSLATION MISSING
 | irc | xxx,irc_out_yyy ^(1)^ |
   String: メッセージ |
-  サーバに IRC メッセージを送信 (メッセージを 512 バイトに合わせて自動分割した後)
+  IRC message sent to server after automatic split
+  (to fit in 512 bytes by default).
 
 | irc | xxx,irc_outtags_yyy ^(1)^ +
   _(WeeChat バージョン 0.3.4 以上で利用可)_ |
@@ -10617,17 +10621,19 @@ WeeChat とプラグインが使う修飾子のリスト:
   IRC サーバから受信したメッセージの内容 (文字セットをデコードした後) |
   メッセージの新しい内容
 
+// TRANSLATION MISSING
 | irc_out1_xxx ^(1)^ +
   _(WeeChat バージョン 0.3.7 以上で利用可)_ |
   サーバ名 |
-  IRC サーバに送信するメッセージの内容
-  (512 バイトを超えないように自動分割する前) |
+  Content of message about to be sent to IRC server before automatic split
+  (to fit in 512 bytes by default). |
   メッセージの新しい内容
 
+// TRANSLATION MISSING
 | irc_out_xxx ^(1)^ |
   サーバ名 |
-  IRC サーバに送信するメッセージの内容
-  (512 バイトを超えないように自動分割した後) |
+  Content of message about to be sent to IRC server after automatic split
+  (to fit in 512 bytes by default). |
   メッセージの新しい内容
 
 | color_decode_ansi +
diff --git a/doc/pl/autogen/plugin_api/infos_hashtable.adoc b/doc/pl/autogen/plugin_api/infos_hashtable.adoc
index 21ae4f729..edb22e905 100644
--- a/doc/pl/autogen/plugin_api/infos_hashtable.adoc
+++ b/doc/pl/autogen/plugin_api/infos_hashtable.adoc
@@ -8,6 +8,6 @@
 
 | irc | irc_message_parse | przetwarza wiadomość IRC | "message": wiadomość IRC, "server": nazwa serwera (opcjonalne) | "tags": tagi, "message_without_tags": wiadomość bez tagów, "nick": nick, "host": host, "command": komenda, "channel": kanał, "arguments": argumenty (razem z kanałem), "text": tekst (na przykład wiadomość użytkownika), "pos_command": indeks wiadomości "command" message ("-1" jeśli "command" nie zostało znalezione), "pos_arguments": indeks wiadomości "arguments" ("-1" jeśli "arguments" nie zostało znalezione), "pos_channel": indeks wiadomości "channel" ("-1" jeśli "channel" nie został znaleziony), "pos_text": indeks słowa "text" ("-1" jeśli "text" nie został znaleziony)
 
-| irc | irc_message_split | dziel wiadomość IRC (aby zmieściła się w 512 bajtach) | "message": wiadomość IRC, "server": nazwa serwera (opcjonalne) | "msg1" ... "msgN": wiadomości do wysłania (bez kończącego "\r\n"), "args1" ... "argsN": argumenty wiadomości, "count": ilość wiadomości
+| irc | irc_message_split | split an IRC message (to fit in 512 bytes by default) | "message": wiadomość IRC, "server": nazwa serwera (opcjonalne) | "msg1" ... "msgN": wiadomości do wysłania (bez kończącego "\r\n"), "args1" ... "argsN": argumenty wiadomości, "count": ilość wiadomości
 
 |===
diff --git a/doc/pl/autogen/user/irc_options.adoc b/doc/pl/autogen/user/irc_options.adoc
index 8886e1c9a..6b32f7ee4 100644
--- a/doc/pl/autogen/user/irc_options.adoc
+++ b/doc/pl/autogen/user/irc_options.adoc
@@ -704,6 +704,12 @@
 ** wartości: dowolny ciąg
 ** domyślna wartość: `+""+`
 
+* [[option_irc.server_default.split_msg_max_length]] *irc.server_default.split_msg_max_length*
+** opis: pass:none[split outgoing IRC messages to fit in this number of chars; the default value is 512, this is a safe and recommended value); value 0 disables the split (not recommended, unless you know what you do); allowed values are 0 or any integer between 128 and 4096; this option should be changed only on non-standard IRC servers, for example gateways like bitlbee]
+** typ: liczba
+** wartości: 0 .. 4096
+** domyślna wartość: `+512+`
+
 * [[option_irc.server_default.ssl]] *irc.server_default.ssl*
 ** opis: pass:none[użyj protokołu SSL do komunikacji z serwerem]
 ** typ: bool
diff --git a/po/cs.po b/po/cs.po
index 9bf8d42a4..87232574d 100644
--- a/po/cs.po
+++ b/po/cs.po
@@ -21,7 +21,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: WeeChat\n"
 "Report-Msgid-Bugs-To: flashcode@flashtux.org\n"
-"POT-Creation-Date: 2018-01-11 15:55+0100\n"
+"POT-Creation-Date: 2018-01-13 22:15+0100\n"
 "PO-Revision-Date: 2018-01-06 13:50+0100\n"
 "Last-Translator: Ondřej Súkup <mimi.vx@gmail.com>\n"
 "Language-Team: weechat-dev <weechat-dev@nongnu.org>\n"
@@ -7847,6 +7847,12 @@ msgid ""
 "%s%s: invalid fingerprint, it must contain only hexadecimal digits (0-9, a-f)"
 msgstr ""
 
+#, c-format
+msgid ""
+"%s%s: invalid length for split, it must be either 0 or any integer between "
+"128 and 4096"
+msgstr ""
+
 #, c-format
 msgid ""
 "%s%s: warning: server \"%s\" not found in configuration file, not deleted in "
@@ -8139,6 +8145,14 @@ msgid ""
 msgstr ""
 "seznam notifikací pro server (místo změny této volby použijte příkaz /notify)"
 
+msgid ""
+"split outgoing IRC messages to fit in this number of chars; the default "
+"value is 512, this is a safe and recommended value); value 0 disables the "
+"split (not recommended, unless you know what you do); allowed values are 0 "
+"or any integer between 128 and 4096; this option should be changed only on "
+"non-standard IRC servers, for example gateways like bitlbee"
+msgstr ""
+
 #, fuzzy, c-format
 msgid "%s%s: error adding server \"%s\""
 msgstr "%s%s: chyba při přidávání notifikace"
@@ -8735,7 +8749,8 @@ msgid ""
 "index of \"text\" message (\"-1\" if \"text\" was not found)"
 msgstr ""
 
-msgid "split an IRC message (to fit in 512 bytes)"
+#, fuzzy
+msgid "split an IRC message (to fit in 512 bytes by default)"
 msgstr "rozděl IRC zprávu (aby se vlezla do 512 bytů)"
 
 #. TRANSLATORS: please do not translate key names (enclosed by quotes)
diff --git a/po/de.po b/po/de.po
index a72457c34..a41fbc027 100644
--- a/po/de.po
+++ b/po/de.po
@@ -23,7 +23,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: WeeChat\n"
 "Report-Msgid-Bugs-To: flashcode@flashtux.org\n"
-"POT-Creation-Date: 2018-01-11 15:55+0100\n"
+"POT-Creation-Date: 2018-01-13 22:15+0100\n"
 "PO-Revision-Date: 2018-01-11 20:46+0100\n"
 "Last-Translator: Nils Görs <weechatter@arcor.de>\n"
 "Language-Team: German <kde-i18n-de@kde.org>\n"
@@ -2504,7 +2504,8 @@ msgstr ""
 "\"weechat.look.prefix_*\" definiert ist.\n"
 "\n"
 "Folgende Escapesequenzen werden unterstützt:\n"
-"  \\\" \\\\ \\a \\b \\e \\f \\n \\r \\t \\v \\0ooo \\xhh \\uhhhh \\Uhhhhhhhh\n"
+"  \\\" \\\\ \\a \\b \\e \\f \\n \\r \\t \\v \\0ooo \\xhh \\uhhhh "
+"\\Uhhhhhhhh\n"
 "\n"
 "Beispiele:\n"
 "  zeigt eine Erinnerung, mit Highlight, im Core-Buffer dar:\n"
@@ -9364,6 +9365,12 @@ msgstr ""
 "%s%s: ungültiger Fingerprint, es sind nur hexadezimale Zeichen erlaubt (0-9, "
 "a-f)"
 
+#, c-format
+msgid ""
+"%s%s: invalid length for split, it must be either 0 or any integer between "
+"128 and 4096"
+msgstr ""
+
 #, c-format
 msgid ""
 "%s%s: warning: server \"%s\" not found in configuration file, not deleted in "
@@ -9729,6 +9736,14 @@ msgstr ""
 "Liste mit Benachrichtigung für Server (diese Einstellung sollte nicht direkt "
 "verändert werden. Dazu sollte der Befehl /notify genutzt werden)"
 
+msgid ""
+"split outgoing IRC messages to fit in this number of chars; the default "
+"value is 512, this is a safe and recommended value); value 0 disables the "
+"split (not recommended, unless you know what you do); allowed values are 0 "
+"or any integer between 128 and 4096; this option should be changed only on "
+"non-standard IRC servers, for example gateways like bitlbee"
+msgstr ""
+
 #, c-format
 msgid "%s%s: error adding server \"%s\""
 msgstr "%s%s: Fehler bei der Erstellung des Servers \"%s\""
@@ -10478,7 +10493,8 @@ msgstr ""
 "nicht gefunden wird),\"pos_text\": Index für \"text\" Nachricht (\"-1\" "
 "falls \"text\" nicht gefunden wird)"
 
-msgid "split an IRC message (to fit in 512 bytes)"
+#, fuzzy
+msgid "split an IRC message (to fit in 512 bytes by default)"
 msgstr ""
 "dient zum Aufteilen einer überlangen IRC Nachricht (in maximal 512 Bytes "
 "große Nachrichten)"
diff --git a/po/es.po b/po/es.po
index 7f49a3c23..72b38543c 100644
--- a/po/es.po
+++ b/po/es.po
@@ -22,7 +22,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: WeeChat\n"
 "Report-Msgid-Bugs-To: flashcode@flashtux.org\n"
-"POT-Creation-Date: 2018-01-11 15:55+0100\n"
+"POT-Creation-Date: 2018-01-13 22:15+0100\n"
 "PO-Revision-Date: 2018-01-06 13:50+0100\n"
 "Last-Translator: Elián Hanisch <lambdae2@gmail.com>\n"
 "Language-Team: weechat-dev <weechat-dev@nongnu.org>\n"
@@ -8107,6 +8107,12 @@ msgid ""
 "%s%s: invalid fingerprint, it must contain only hexadecimal digits (0-9, a-f)"
 msgstr ""
 
+#, c-format
+msgid ""
+"%s%s: invalid length for split, it must be either 0 or any integer between "
+"128 and 4096"
+msgstr ""
+
 #, c-format
 msgid ""
 "%s%s: warning: server \"%s\" not found in configuration file, not deleted in "
@@ -8410,6 +8416,14 @@ msgstr ""
 "Lista de notificaciones para el servidor (no se debería cambiar esta opción, "
 "usar el comando /notify para ello)"
 
+msgid ""
+"split outgoing IRC messages to fit in this number of chars; the default "
+"value is 512, this is a safe and recommended value); value 0 disables the "
+"split (not recommended, unless you know what you do); allowed values are 0 "
+"or any integer between 128 and 4096; this option should be changed only on "
+"non-standard IRC servers, for example gateways like bitlbee"
+msgstr ""
+
 #, fuzzy, c-format
 msgid "%s%s: error adding server \"%s\""
 msgstr "%s%s: error al crear el servidor \"%s\""
@@ -9052,7 +9066,8 @@ msgstr ""
 "\": apodo, \"host\": host, \"command\": comando, \"channel\": canal, "
 "\"arguments\": argumentos (incluye el canal)"
 
-msgid "split an IRC message (to fit in 512 bytes)"
+#, fuzzy
+msgid "split an IRC message (to fit in 512 bytes by default)"
 msgstr "separar un mensaje IRC (para coincidir en 512 bytes)"
 
 #. TRANSLATORS: please do not translate key names (enclosed by quotes)
diff --git a/po/fr.po b/po/fr.po
index 848485fdb..16db7b4b6 100644
--- a/po/fr.po
+++ b/po/fr.po
@@ -21,8 +21,8 @@ msgid ""
 msgstr ""
 "Project-Id-Version: WeeChat\n"
 "Report-Msgid-Bugs-To: flashcode@flashtux.org\n"
-"POT-Creation-Date: 2018-01-11 15:55+0100\n"
-"PO-Revision-Date: 2018-01-11 16:03+0100\n"
+"POT-Creation-Date: 2018-01-13 22:15+0100\n"
+"PO-Revision-Date: 2018-01-13 22:15+0100\n"
 "Last-Translator: Sébastien Helleu <flashcode@flashtux.org>\n"
 "Language-Team: weechat-dev <weechat-dev@nongnu.org>\n"
 "Language: fr\n"
@@ -9178,6 +9178,14 @@ msgstr ""
 "%s%s : empreinte invalide, elle doit contenir uniquement des chiffres "
 "hexadécimaux (0-9, a-f)"
 
+#, c-format
+msgid ""
+"%s%s: invalid length for split, it must be either 0 or any integer between "
+"128 and 4096"
+msgstr ""
+"%s%s : longueur invalide pour le découpage, elle doit être soit 0 ou bien "
+"tout entier compris entre 128 et 4096"
+
 #, c-format
 msgid ""
 "%s%s: warning: server \"%s\" not found in configuration file, not deleted in "
@@ -9523,6 +9531,20 @@ msgstr ""
 "liste de notifications pour le serveur (vous ne devriez pas changer cette "
 "option mais utiliser la commande /notify)"
 
+msgid ""
+"split outgoing IRC messages to fit in this number of chars; the default "
+"value is 512, this is a safe and recommended value); value 0 disables the "
+"split (not recommended, unless you know what you do); allowed values are 0 "
+"or any integer between 128 and 4096; this option should be changed only on "
+"non-standard IRC servers, for example gateways like bitlbee"
+msgstr ""
+"découper les messages IRC sortants pour tenir dans ce nombre de caractères ; "
+"la valeur par défaut est 512, c'est une valeur sûre et recommandée ; la "
+"valeur 0 désactive le découpage (non recommandé, sauf si vous êtes sûr de ce "
+"que vous faites) ; les valeurs autorisées sont 0 ou tout entier compris "
+"entre 128 et 4096 ; cette option devrait être changée seulement sur les "
+"serveurs IRC non standards, par exemple sur les passerelles comme bitlbee"
+
 #, c-format
 msgid "%s%s: error adding server \"%s\""
 msgstr "%s%s : erreur d'ajout du serveur \"%s\""
@@ -10233,8 +10255,8 @@ msgstr ""
 "dans le message (\"-1\" si \"channel\" n'a pas été trouvé), \"pos_text\" : "
 "index de \"text\" dans le message (\"-1\" si \"text\" n'a pas été trouvé)"
 
-msgid "split an IRC message (to fit in 512 bytes)"
-msgstr "découper un message IRC (pour tenir dans les 512 octets)"
+msgid "split an IRC message (to fit in 512 bytes by default)"
+msgstr "découper un message IRC (pour tenir dans les 512 octets par défaut)"
 
 #. TRANSLATORS: please do not translate key names (enclosed by quotes)
 msgid ""
diff --git a/po/hu.po b/po/hu.po
index ba422ba8d..919c702a6 100644
--- a/po/hu.po
+++ b/po/hu.po
@@ -20,7 +20,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: WeeChat\n"
 "Report-Msgid-Bugs-To: flashcode@flashtux.org\n"
-"POT-Creation-Date: 2018-01-11 15:55+0100\n"
+"POT-Creation-Date: 2018-01-13 22:15+0100\n"
 "PO-Revision-Date: 2018-01-06 13:50+0100\n"
 "Last-Translator: Andras Voroskoi <voroskoi@frugalware.org>\n"
 "Language-Team: weechat-dev <weechat-dev@nongnu.org>\n"
@@ -7309,6 +7309,12 @@ msgid ""
 "%s%s: invalid fingerprint, it must contain only hexadecimal digits (0-9, a-f)"
 msgstr ""
 
+#, c-format
+msgid ""
+"%s%s: invalid length for split, it must be either 0 or any integer between "
+"128 and 4096"
+msgstr ""
+
 #, c-format
 msgid ""
 "%s%s: warning: server \"%s\" not found in configuration file, not deleted in "
@@ -7572,6 +7578,14 @@ msgid ""
 "command instead)"
 msgstr ""
 
+msgid ""
+"split outgoing IRC messages to fit in this number of chars; the default "
+"value is 512, this is a safe and recommended value); value 0 disables the "
+"split (not recommended, unless you know what you do); allowed values are 0 "
+"or any integer between 128 and 4096; this option should be changed only on "
+"non-standard IRC servers, for example gateways like bitlbee"
+msgstr ""
+
 #, fuzzy, c-format
 msgid "%s%s: error adding server \"%s\""
 msgstr "%s nincs elég memória az információs pult üzenethez\n"
@@ -8130,7 +8144,7 @@ msgid ""
 "index of \"text\" message (\"-1\" if \"text\" was not found)"
 msgstr ""
 
-msgid "split an IRC message (to fit in 512 bytes)"
+msgid "split an IRC message (to fit in 512 bytes by default)"
 msgstr ""
 
 #. TRANSLATORS: please do not translate key names (enclosed by quotes)
diff --git a/po/it.po b/po/it.po
index 30b600917..958a57b34 100644
--- a/po/it.po
+++ b/po/it.po
@@ -20,7 +20,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: WeeChat\n"
 "Report-Msgid-Bugs-To: flashcode@flashtux.org\n"
-"POT-Creation-Date: 2018-01-11 15:55+0100\n"
+"POT-Creation-Date: 2018-01-13 22:15+0100\n"
 "PO-Revision-Date: 2018-01-06 13:50+0100\n"
 "Last-Translator: Esteban I. Ruiz Moreno <exio4.com@gmail.com>\n"
 "Language-Team: weechat-dev <weechat-dev@nongnu.org>\n"
@@ -8283,6 +8283,12 @@ msgid ""
 "%s%s: invalid fingerprint, it must contain only hexadecimal digits (0-9, a-f)"
 msgstr ""
 
+#, c-format
+msgid ""
+"%s%s: invalid length for split, it must be either 0 or any integer between "
+"128 and 4096"
+msgstr ""
+
 #, c-format
 msgid ""
 "%s%s: warning: server \"%s\" not found in configuration file, not deleted in "
@@ -8592,6 +8598,14 @@ msgstr ""
 "elenco notifiche per il server (si consiglia di non cambiare questa opzione "
 "ma di usare il comando /notify)"
 
+msgid ""
+"split outgoing IRC messages to fit in this number of chars; the default "
+"value is 512, this is a safe and recommended value); value 0 disables the "
+"split (not recommended, unless you know what you do); allowed values are 0 "
+"or any integer between 128 and 4096; this option should be changed only on "
+"non-standard IRC servers, for example gateways like bitlbee"
+msgstr ""
+
 #, fuzzy, c-format
 msgid "%s%s: error adding server \"%s\""
 msgstr "%s%s: errore durante la creazione del server \"%s\""
@@ -9251,7 +9265,8 @@ msgstr ""
 "nick, \"host\": nome host, \"command\": comando, \"channel\": canale, "
 "\"arguments\": argomenti (include il canale)"
 
-msgid "split an IRC message (to fit in 512 bytes)"
+#, fuzzy
+msgid "split an IRC message (to fit in 512 bytes by default)"
 msgstr "divide un messaggio IRC (per adattarlo in 512 byte)"
 
 #. TRANSLATORS: please do not translate key names (enclosed by quotes)
diff --git a/po/ja.po b/po/ja.po
index aecc9ef09..2564c4581 100644
--- a/po/ja.po
+++ b/po/ja.po
@@ -20,7 +20,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: WeeChat\n"
 "Report-Msgid-Bugs-To: flashcode@flashtux.org\n"
-"POT-Creation-Date: 2018-01-11 15:55+0100\n"
+"POT-Creation-Date: 2018-01-13 22:15+0100\n"
 "PO-Revision-Date: 2018-01-13 09:00+0900\n"
 "Last-Translator: AYANOKOUZI, Ryuunosuke <i38w7i3@yahoo.co.jp>\n"
 "Language-Team: Japanese <https://github.com/l/weechat/tree/master/"
@@ -8812,6 +8812,12 @@ msgstr ""
 "%s%s: 指紋が間違っています、指紋の各桁は 16 進数で使える文字 (0-9, a-f) を"
 "使ってください"
 
+#, c-format
+msgid ""
+"%s%s: invalid length for split, it must be either 0 or any integer between "
+"128 and 4096"
+msgstr ""
+
 #, c-format
 msgid ""
 "%s%s: warning: server \"%s\" not found in configuration file, not deleted in "
@@ -9135,6 +9141,14 @@ msgid ""
 "command instead)"
 msgstr "サーバの通知リスト (これを変更する場合は、/notify コマンドを使うこと)"
 
+msgid ""
+"split outgoing IRC messages to fit in this number of chars; the default "
+"value is 512, this is a safe and recommended value); value 0 disables the "
+"split (not recommended, unless you know what you do); allowed values are 0 "
+"or any integer between 128 and 4096; this option should be changed only on "
+"non-standard IRC servers, for example gateways like bitlbee"
+msgstr ""
+
 #, c-format
 msgid "%s%s: error adding server \"%s\""
 msgstr "%s%s: サーバ \"%s\" 追加中のエラー"
@@ -9817,7 +9831,8 @@ msgstr ""
 "が見つからない場合 \"-1\")、\"pos_text\": \"text\" メッセージのインデックス "
 "(\"text\" が見つからない場合 \"-1\")"
 
-msgid "split an IRC message (to fit in 512 bytes)"
+#, fuzzy
+msgid "split an IRC message (to fit in 512 bytes by default)"
 msgstr "IRC メッセージを分割 (512 バイトに収める)"
 
 #. TRANSLATORS: please do not translate key names (enclosed by quotes)
diff --git a/po/pl.po b/po/pl.po
index 4be8453e1..61cfc465f 100644
--- a/po/pl.po
+++ b/po/pl.po
@@ -21,7 +21,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: WeeChat\n"
 "Report-Msgid-Bugs-To: flashcode@flashtux.org\n"
-"POT-Creation-Date: 2018-01-11 15:55+0100\n"
+"POT-Creation-Date: 2018-01-13 22:15+0100\n"
 "PO-Revision-Date: 2018-01-06 13:50+0100\n"
 "Last-Translator: Krzysztof Korościk <soltys@soltys.info>\n"
 "Language-Team: weechat-dev <weechat-dev@nongnu.org>\n"
@@ -8958,6 +8958,12 @@ msgstr ""
 "%s%s: niepoprawny skrót, może on zawierać tylko znaki heksadecymalne (0-9, a-"
 "f)"
 
+#, c-format
+msgid ""
+"%s%s: invalid length for split, it must be either 0 or any integer between "
+"128 and 4096"
+msgstr ""
+
 #, c-format
 msgid ""
 "%s%s: warning: server \"%s\" not found in configuration file, not deleted in "
@@ -9300,6 +9306,14 @@ msgstr ""
 "lista powiadomień dla tego serwera (nie powinieneś zmieniać tej opcji tylko "
 "użyć w zamian komendy /notify)"
 
+msgid ""
+"split outgoing IRC messages to fit in this number of chars; the default "
+"value is 512, this is a safe and recommended value); value 0 disables the "
+"split (not recommended, unless you know what you do); allowed values are 0 "
+"or any integer between 128 and 4096; this option should be changed only on "
+"non-standard IRC servers, for example gateways like bitlbee"
+msgstr ""
+
 #, c-format
 msgid "%s%s: error adding server \"%s\""
 msgstr "%s%s: błąd podczas dodawania serwera \"%s\""
@@ -9993,7 +10007,8 @@ msgstr ""
 "\"channel\" nie został znaleziony), \"pos_text\": indeks słowa \"text"
 "\" (\"-1\" jeśli \"text\" nie został znaleziony)"
 
-msgid "split an IRC message (to fit in 512 bytes)"
+#, fuzzy
+msgid "split an IRC message (to fit in 512 bytes by default)"
 msgstr "dziel wiadomość IRC (aby zmieściła się w 512 bajtach)"
 
 #. TRANSLATORS: please do not translate key names (enclosed by quotes)
diff --git a/po/pt.po b/po/pt.po
index 0e269b49e..b41c92836 100644
--- a/po/pt.po
+++ b/po/pt.po
@@ -20,7 +20,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: WeeChat\n"
 "Report-Msgid-Bugs-To: flashcode@flashtux.org\n"
-"POT-Creation-Date: 2018-01-11 15:55+0100\n"
+"POT-Creation-Date: 2018-01-13 22:15+0100\n"
 "PO-Revision-Date: 2018-01-06 13:50+0100\n"
 "Last-Translator: Vasco Almeida <vascomalmeida@sapo.pt>\n"
 "Language-Team: Portuguese <>\n"
@@ -8659,6 +8659,12 @@ msgstr ""
 "%s%s: impressão digital inválida, deve conter apenas dígitos hexadecimais "
 "(0-9, a-f)"
 
+#, c-format
+msgid ""
+"%s%s: invalid length for split, it must be either 0 or any integer between "
+"128 and 4096"
+msgstr ""
+
 #, c-format
 msgid ""
 "%s%s: warning: server \"%s\" not found in configuration file, not deleted in "
@@ -9001,6 +9007,14 @@ msgstr ""
 "lista de notificação do servidor (não deve alterar esta opção, mas sim usar "
 "o comando /notify)"
 
+msgid ""
+"split outgoing IRC messages to fit in this number of chars; the default "
+"value is 512, this is a safe and recommended value); value 0 disables the "
+"split (not recommended, unless you know what you do); allowed values are 0 "
+"or any integer between 128 and 4096; this option should be changed only on "
+"non-standard IRC servers, for example gateways like bitlbee"
+msgstr ""
+
 #, c-format
 msgid "%s%s: error adding server \"%s\""
 msgstr "%s%s: erro ao adicionar ao servidor \"%s\""
@@ -9696,7 +9710,8 @@ msgstr ""
 "\"channel\"), \"pos_text\": índice de \"text\" na mensagem (\"-1\" se não "
 "encontrar \"text\")"
 
-msgid "split an IRC message (to fit in 512 bytes)"
+#, fuzzy
+msgid "split an IRC message (to fit in 512 bytes by default)"
 msgstr "dividir uma mensagem de IRC (para caber em 512 bytes)"
 
 #. TRANSLATORS: please do not translate key names (enclosed by quotes)
diff --git a/po/pt_BR.po b/po/pt_BR.po
index 06b1eca8e..803ca3b87 100644
--- a/po/pt_BR.po
+++ b/po/pt_BR.po
@@ -21,7 +21,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: WeeChat\n"
 "Report-Msgid-Bugs-To: flashcode@flashtux.org\n"
-"POT-Creation-Date: 2018-01-11 15:55+0100\n"
+"POT-Creation-Date: 2018-01-13 22:15+0100\n"
 "PO-Revision-Date: 2018-01-06 13:50+0100\n"
 "Last-Translator: Eduardo Elias <camponez@gmail.com>\n"
 "Language-Team: weechat-dev <weechat-dev@nongnu.org>\n"
@@ -7738,6 +7738,12 @@ msgid ""
 "%s%s: invalid fingerprint, it must contain only hexadecimal digits (0-9, a-f)"
 msgstr ""
 
+#, c-format
+msgid ""
+"%s%s: invalid length for split, it must be either 0 or any integer between "
+"128 and 4096"
+msgstr ""
+
 #, c-format
 msgid ""
 "%s%s: warning: server \"%s\" not found in configuration file, not deleted in "
@@ -8035,6 +8041,14 @@ msgstr ""
 "lista de notificação para o servidor (você não deve alterar esta opção, mas "
 "sim utilizar o comando /notify)"
 
+msgid ""
+"split outgoing IRC messages to fit in this number of chars; the default "
+"value is 512, this is a safe and recommended value); value 0 disables the "
+"split (not recommended, unless you know what you do); allowed values are 0 "
+"or any integer between 128 and 4096; this option should be changed only on "
+"non-standard IRC servers, for example gateways like bitlbee"
+msgstr ""
+
 #, fuzzy, c-format
 msgid "%s%s: error adding server \"%s\""
 msgstr "%s%s: erro ao criar servidor \"%s\""
@@ -8599,7 +8613,7 @@ msgstr ""
 "\"nick\": apelido, \"host\": host, \"command\": comando, \"channel\": canal, "
 "\"arguments\": argumentos (inclui canal)"
 
-msgid "split an IRC message (to fit in 512 bytes)"
+msgid "split an IRC message (to fit in 512 bytes by default)"
 msgstr ""
 
 #. TRANSLATORS: please do not translate key names (enclosed by quotes)
diff --git a/po/ru.po b/po/ru.po
index c6ecf1f7b..884c7bedd 100644
--- a/po/ru.po
+++ b/po/ru.po
@@ -21,7 +21,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: WeeChat\n"
 "Report-Msgid-Bugs-To: flashcode@flashtux.org\n"
-"POT-Creation-Date: 2018-01-11 15:55+0100\n"
+"POT-Creation-Date: 2018-01-13 22:15+0100\n"
 "PO-Revision-Date: 2018-01-06 13:50+0100\n"
 "Last-Translator: Aleksey V Zapparov AKA ixti <ixti@member.fsf.org>\n"
 "Language-Team: weechat-dev <weechat-dev@nongnu.org>\n"
@@ -7339,6 +7339,12 @@ msgid ""
 "%s%s: invalid fingerprint, it must contain only hexadecimal digits (0-9, a-f)"
 msgstr ""
 
+#, c-format
+msgid ""
+"%s%s: invalid length for split, it must be either 0 or any integer between "
+"128 and 4096"
+msgstr ""
+
 #, c-format
 msgid ""
 "%s%s: warning: server \"%s\" not found in configuration file, not deleted in "
@@ -7604,6 +7610,14 @@ msgid ""
 "command instead)"
 msgstr ""
 
+msgid ""
+"split outgoing IRC messages to fit in this number of chars; the default "
+"value is 512, this is a safe and recommended value); value 0 disables the "
+"split (not recommended, unless you know what you do); allowed values are 0 "
+"or any integer between 128 and 4096; this option should be changed only on "
+"non-standard IRC servers, for example gateways like bitlbee"
+msgstr ""
+
 #, fuzzy, c-format
 msgid "%s%s: error adding server \"%s\""
 msgstr "%s недостаточно памяти для сообщения в строке информации\n"
@@ -8167,7 +8181,7 @@ msgid ""
 "index of \"text\" message (\"-1\" if \"text\" was not found)"
 msgstr ""
 
-msgid "split an IRC message (to fit in 512 bytes)"
+msgid "split an IRC message (to fit in 512 bytes by default)"
 msgstr ""
 
 #. TRANSLATORS: please do not translate key names (enclosed by quotes)
diff --git a/po/tr.po b/po/tr.po
index 5c3355628..06fc5abaf 100644
--- a/po/tr.po
+++ b/po/tr.po
@@ -20,7 +20,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: WeeChat\n"
 "Report-Msgid-Bugs-To: flashcode@flashtux.org\n"
-"POT-Creation-Date: 2018-01-11 15:55+0100\n"
+"POT-Creation-Date: 2018-01-13 22:15+0100\n"
 "PO-Revision-Date: 2017-06-26 23:33+0200\n"
 "Last-Translator: Hasan Kiran <sunder67@hotmail.com>\n"
 "Language-Team: weechat-dev <weechat-dev@nongnu.org>\n"
@@ -6638,6 +6638,12 @@ msgid ""
 "%s%s: invalid fingerprint, it must contain only hexadecimal digits (0-9, a-f)"
 msgstr ""
 
+#, c-format
+msgid ""
+"%s%s: invalid length for split, it must be either 0 or any integer between "
+"128 and 4096"
+msgstr ""
+
 #, c-format
 msgid ""
 "%s%s: warning: server \"%s\" not found in configuration file, not deleted in "
@@ -6868,6 +6874,14 @@ msgid ""
 "command instead)"
 msgstr ""
 
+msgid ""
+"split outgoing IRC messages to fit in this number of chars; the default "
+"value is 512, this is a safe and recommended value); value 0 disables the "
+"split (not recommended, unless you know what you do); allowed values are 0 "
+"or any integer between 128 and 4096; this option should be changed only on "
+"non-standard IRC servers, for example gateways like bitlbee"
+msgstr ""
+
 #, fuzzy, c-format
 msgid "%s%s: error adding server \"%s\""
 msgstr "%sFiltre eklenirken hata"
@@ -7387,7 +7401,7 @@ msgid ""
 "index of \"text\" message (\"-1\" if \"text\" was not found)"
 msgstr ""
 
-msgid "split an IRC message (to fit in 512 bytes)"
+msgid "split an IRC message (to fit in 512 bytes by default)"
 msgstr ""
 
 #. TRANSLATORS: please do not translate key names (enclosed by quotes)
diff --git a/po/weechat.pot b/po/weechat.pot
index 284bb32a6..a285e1890 100644
--- a/po/weechat.pot
+++ b/po/weechat.pot
@@ -21,7 +21,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: WeeChat\n"
 "Report-Msgid-Bugs-To: flashcode@flashtux.org\n"
-"POT-Creation-Date: 2018-01-11 15:55+0100\n"
+"POT-Creation-Date: 2018-01-13 22:15+0100\n"
 "PO-Revision-Date: 2014-08-16 10:27+0200\n"
 "Last-Translator: Sébastien Helleu <flashcode@flashtux.org>\n"
 "Language-Team: weechat-dev <weechat-dev@nongnu.org>\n"
@@ -6520,6 +6520,12 @@ msgid ""
 "%s%s: invalid fingerprint, it must contain only hexadecimal digits (0-9, a-f)"
 msgstr ""
 
+#, c-format
+msgid ""
+"%s%s: invalid length for split, it must be either 0 or any integer between "
+"128 and 4096"
+msgstr ""
+
 #, c-format
 msgid ""
 "%s%s: warning: server \"%s\" not found in configuration file, not deleted in "
@@ -6750,6 +6756,14 @@ msgid ""
 "command instead)"
 msgstr ""
 
+msgid ""
+"split outgoing IRC messages to fit in this number of chars; the default "
+"value is 512, this is a safe and recommended value); value 0 disables the "
+"split (not recommended, unless you know what you do); allowed values are 0 "
+"or any integer between 128 and 4096; this option should be changed only on "
+"non-standard IRC servers, for example gateways like bitlbee"
+msgstr ""
+
 #, c-format
 msgid "%s%s: error adding server \"%s\""
 msgstr ""
@@ -7265,7 +7279,7 @@ msgid ""
 "index of \"text\" message (\"-1\" if \"text\" was not found)"
 msgstr ""
 
-msgid "split an IRC message (to fit in 512 bytes)"
+msgid "split an IRC message (to fit in 512 bytes by default)"
 msgstr ""
 
 #. TRANSLATORS: please do not translate key names (enclosed by quotes)
diff --git a/src/plugins/irc/irc-command.c b/src/plugins/irc/irc-command.c
index 943f1be33..7fb56d37c 100644
--- a/src/plugins/irc/irc-command.c
+++ b/src/plugins/irc/irc-command.c
@@ -4969,6 +4969,15 @@ irc_command_display_server (struct t_irc_server *server, int with_detail)
             weechat_printf (NULL, "  notify . . . . . . . : %s'%s'",
                             IRC_COLOR_CHAT_VALUE,
                             weechat_config_string (server->options[IRC_SERVER_OPTION_NOTIFY]));
+
+        /* split_msg_max_length */
+        if (weechat_config_option_is_null (server->options[IRC_SERVER_OPTION_SPLIT_MSG_MAX_LENGTH]))
+            weechat_printf (NULL, "  split_msg_max_length :   (%d)",
+                            IRC_SERVER_OPTION_INTEGER(server, IRC_SERVER_OPTION_SPLIT_MSG_MAX_LENGTH));
+        else
+            weechat_printf (NULL, "  split_msg_max_length : %s%d",
+                            IRC_COLOR_CHAT_VALUE,
+                            weechat_config_integer (server->options[IRC_SERVER_OPTION_SPLIT_MSG_MAX_LENGTH]));
     }
     else
     {
diff --git a/src/plugins/irc/irc-config.c b/src/plugins/irc/irc-config.c
index c0aa17b7f..319e8e9ab 100644
--- a/src/plugins/irc/irc-config.c
+++ b/src/plugins/irc/irc-config.c
@@ -995,6 +995,8 @@ irc_config_server_check_value_cb (const void *pointer, void *data,
 {
     int index_option, proxy_found;
     const char *pos_error, *proxy_name;
+    char *error;
+    long number;
     struct t_infolist *infolist;
 #ifdef HAVE_GNUTLS
     char *fingerprint_eval, **fingerprints, *str_sizes;
@@ -1127,6 +1129,31 @@ irc_config_server_check_value_cb (const void *pointer, void *data,
                 }
 #endif /* HAVE_GNUTLS */
                 break;
+            case IRC_SERVER_OPTION_SPLIT_MSG_MAX_LENGTH:
+                if (!value || !value[0])
+                    break;
+                error = NULL;
+                number = strtol (value, &error, 10);
+                if (!error || error[0])
+                {
+                    /*
+                     * not a valid number, but we return 1 (OK) to let WeeChat
+                     * display the appropriate error
+                     */
+                    return 1;
+                }
+                if ((number < 0)
+                    || ((number > 0) && (number < 128))
+                    || (number > 4096))
+                {
+                    weechat_printf (
+                            NULL,
+                            _("%s%s: invalid length for split, it must be "
+                              "either 0 or any integer between 128 and 4096"),
+                            weechat_prefix ("error"), IRC_PLUGIN_NAME);
+                    return 0;
+                }
+                break;
         }
     }
 
@@ -2264,6 +2291,29 @@ irc_config_server_new_option (struct t_config_file *config_file,
                 callback_change_data,
                 NULL, NULL, NULL);
             break;
+        case IRC_SERVER_OPTION_SPLIT_MSG_MAX_LENGTH:
+            new_option = weechat_config_new_option (
+                config_file, section,
+                option_name, "integer",
+                N_("split outgoing IRC messages to fit in this number of chars; "
+                   "the default value is 512, this is a safe and recommended "
+                   "value); "
+                   "value 0 disables the split (not recommended, unless you "
+                   "know what you do); allowed values are 0 or "
+                   "any integer between 128 and 4096; "
+                   "this option should be changed only on non-standard IRC "
+                   "servers, for example gateways like bitlbee"),
+                NULL, 0, 4096,
+                default_value, value,
+                null_value_allowed,
+                callback_check_value,
+                callback_check_value_pointer,
+                callback_check_value_data,
+                callback_change,
+                callback_change_pointer,
+                callback_change_data,
+                NULL, NULL, NULL);
+            break;
         case IRC_SERVER_NUM_OPTIONS:
             break;
     }
diff --git a/src/plugins/irc/irc-info.c b/src/plugins/irc/irc-info.c
index b6d0e723c..825d6740c 100644
--- a/src/plugins/irc/irc-info.c
+++ b/src/plugins/irc/irc-info.c
@@ -898,7 +898,7 @@ irc_info_init ()
         &irc_info_info_hashtable_irc_message_parse_cb, NULL, NULL);
     weechat_hook_info_hashtable (
         "irc_message_split",
-        N_("split an IRC message (to fit in 512 bytes)"),
+        N_("split an IRC message (to fit in 512 bytes by default)"),
         N_("\"message\": IRC message, \"server\": server name (optional)"),
         /* TRANSLATORS: please do not translate key names (enclosed by quotes) */
         N_("\"msg1\" ... \"msgN\": messages to send (without final \"\\r\\n\"), "
diff --git a/src/plugins/irc/irc-input.c b/src/plugins/irc/irc-input.c
index 73c183119..e2139c898 100644
--- a/src/plugins/irc/irc-input.c
+++ b/src/plugins/irc/irc-input.c
@@ -139,7 +139,8 @@ irc_input_user_message_display (struct t_gui_buffer *buffer, int action,
 }
 
 /*
- * Sends a PRIVMSG message, and split it if message size is > 512 bytes.
+ * Sends a PRIVMSG message, and split it if message size is > 512 bytes
+ * (by default).
  *
  * Warning: this function makes temporary changes in "message".
  */
diff --git a/src/plugins/irc/irc-message.c b/src/plugins/irc/irc-message.c
index f94cae15d..da87a6924 100644
--- a/src/plugins/irc/irc-message.c
+++ b/src/plugins/irc/irc-message.c
@@ -25,8 +25,9 @@
 
 #include "../weechat-plugin.h"
 #include "irc.h"
-#include "irc-server.h"
 #include "irc-channel.h"
+#include "irc-config.h"
+#include "irc-server.h"
 
 
 /*
@@ -653,13 +654,14 @@ irc_message_split_string (struct t_hashtable *hashtable,
                           const char *arguments,
                           const char *suffix,
                           const char delimiter,
-                          int max_length_host)
+                          int max_length_host,
+                          int max_length)
 {
     const char *pos, *pos_max, *pos_next, *pos_last_delim;
-    char message[1024], *dup_arguments;
-    int max_length, number;
+    char message[8192], *dup_arguments;
+    int number;
 
-    max_length = 510;
+    max_length -= 2;  /* by default: 512 - 2 = 510 bytes */
     if (max_length_host >= 0)
         max_length -= max_length_host;
     else
@@ -753,12 +755,15 @@ irc_message_split_string (struct t_hashtable *hashtable,
 int
 irc_message_split_join (struct t_hashtable *hashtable,
                         const char *tags, const char *host,
-                        const char *arguments)
+                        const char *arguments,
+                        int max_length)
 {
     int number, channels_count, keys_count, length, length_no_channel;
     int length_to_add, index_channel;
     char **channels, **keys, *pos, *str;
-    char msg_to_send[2048], keys_to_add[2048];
+    char msg_to_send[16384], keys_to_add[16384];
+
+    max_length -= 2;  /* by default: 512 - 2 = 510 bytes */
 
     number = 1;
 
@@ -799,7 +804,8 @@ irc_message_split_join (struct t_hashtable *hashtable,
         length_to_add = 1 + strlen (channels[index_channel]);
         if (index_channel < keys_count)
             length_to_add += 1 + strlen (keys[index_channel]);
-        if ((length + length_to_add < 510) || (length == length_no_channel))
+        if ((length + length_to_add < max_length)
+            || (length == length_no_channel))
         {
             if (length + length_to_add < (int)sizeof (msg_to_send))
             {
@@ -864,9 +870,10 @@ int
 irc_message_split_privmsg_notice (struct t_hashtable *hashtable,
                                   char *tags, char *host, char *command,
                                   char *target, char *arguments,
-                                  int max_length_host)
+                                  int max_length_host,
+                                  int max_length)
 {
-    char prefix[512], suffix[2], *pos, saved_char;
+    char prefix[4096], suffix[2], *pos, saved_char;
     int length, rc;
 
     /*
@@ -903,7 +910,7 @@ irc_message_split_privmsg_notice (struct t_hashtable *hashtable,
 
     rc = irc_message_split_string (hashtable, tags, host, command, target,
                                    prefix, arguments, suffix,
-                                   ' ', max_length_host);
+                                   ' ', max_length_host, max_length);
 
     return rc;
 }
@@ -919,9 +926,9 @@ irc_message_split_privmsg_notice (struct t_hashtable *hashtable,
 int
 irc_message_split_005 (struct t_hashtable *hashtable,
                        char *tags, char *host, char *command, char *target,
-                       char *arguments)
+                       char *arguments, int max_length)
 {
-    char *pos, suffix[512];
+    char *pos, suffix[4096];
 
     /*
      * 005 message looks like:
@@ -941,7 +948,8 @@ irc_message_split_005 (struct t_hashtable *hashtable,
     }
 
     return irc_message_split_string (hashtable, tags, host, command, target,
-                                     NULL, arguments, suffix, ' ', -1);
+                                     NULL, arguments, suffix, ' ', -1,
+                                     max_length);
 }
 
 /*
@@ -951,6 +959,10 @@ irc_message_split_005 (struct t_hashtable *hashtable,
  * "\r\n", so full size is 512 bytes (the user data does not include the
  * optional tags before the host).
  *
+ * The 512 max length is the default (recommended) and can be changed with the
+ * server option called "split_msg_max_length" (0 to disable completely the
+ * split).
+ *
  * The split takes care about type of message to do a split at best place in
  * message.
  *
@@ -972,9 +984,10 @@ struct t_hashtable *
 irc_message_split (struct t_irc_server *server, const char *message)
 {
     struct t_hashtable *hashtable;
-    char **argv, **argv_eol, *tags, *host, *command, *arguments, target[512];
+    char **argv, **argv_eol, *tags, *host, *command, *arguments, target[4096];
     char *pos, monitor_action[3];
     int split_ok, argc, index_args, max_length_nick, max_length_host;
+    int split_msg_max_length;
 
     split_ok = 0;
     tags = NULL;
@@ -984,9 +997,22 @@ irc_message_split (struct t_irc_server *server, const char *message)
     argv = NULL;
     argv_eol = NULL;
 
+    if (server)
+    {
+        split_msg_max_length = IRC_SERVER_OPTION_INTEGER(
+            server, IRC_SERVER_OPTION_SPLIT_MSG_MAX_LENGTH);
+    }
+    else
+    {
+        split_msg_max_length = 512;  /* max length by default */
+    }
+
     /* debug message */
     if (weechat_irc_plugin->debug >= 2)
-        weechat_printf (NULL, "irc_message_split: message='%s'", message);
+    {
+        weechat_printf (NULL, "irc_message_split: message='%s', max length=%d",
+                        message, split_msg_max_length);
+    }
 
     hashtable = weechat_hashtable_new (32,
                                        WEECHAT_HASHTABLE_STRING,
@@ -1030,6 +1056,10 @@ irc_message_split (struct t_irc_server *server, const char *message)
         index_args = 1;
     }
 
+    /* split disabled? just add the message as-is */
+    if (split_msg_max_length == 0)
+        goto end;
+
     max_length_nick = (server && (server->nick_max_length > 0)) ?
         server->nick_max_length : 16;
     max_length_host = 1 + /* ":"  */
@@ -1049,7 +1079,7 @@ irc_message_split (struct t_irc_server *server, const char *message)
             hashtable, tags, host, command, NULL, ":",
             (argv_eol[index_args][0] == ':') ?
             argv_eol[index_args] + 1 : argv_eol[index_args],
-            NULL, ' ', max_length_host);
+            NULL, ' ', max_length_host, split_msg_max_length);
     }
     else if (weechat_strcasecmp (command, "monitor") == 0)
     {
@@ -1064,7 +1094,8 @@ irc_message_split (struct t_irc_server *server, const char *message)
                       "%c ", argv_eol[index_args][0]);
             split_ok = irc_message_split_string (
                 hashtable, tags, host, command, NULL, monitor_action,
-                argv_eol[index_args] + 2, NULL, ',', max_length_host);
+                argv_eol[index_args] + 2, NULL, ',', max_length_host,
+                split_msg_max_length);
         }
         else
         {
@@ -1072,17 +1103,17 @@ irc_message_split (struct t_irc_server *server, const char *message)
                 hashtable, tags, host, command, NULL, ":",
                 (argv_eol[index_args][0] == ':') ?
                 argv_eol[index_args] + 1 : argv_eol[index_args],
-                NULL, ',', max_length_host);
+                NULL, ',', max_length_host, split_msg_max_length);
         }
     }
     else if (weechat_strcasecmp (command, "join") == 0)
     {
         /* JOIN #channel1,#channel2,#channel3 key1,key2 */
-        if (strlen (message) > 510)
+        if ((int)strlen (message) > split_msg_max_length - 2)
         {
-            /* split join if it's more than 510 bytes */
+            /* split join if it's too long */
             split_ok = irc_message_split_join (hashtable, tags, host,
-                                               arguments);
+                                               arguments, split_msg_max_length);
         }
     }
     else if ((weechat_strcasecmp (command, "privmsg") == 0)
@@ -1098,7 +1129,7 @@ irc_message_split (struct t_irc_server *server, const char *message)
                 hashtable, tags, host, command, argv[index_args],
                 (argv_eol[index_args + 1][0] == ':') ?
                 argv_eol[index_args + 1] + 1 : argv_eol[index_args + 1],
-                max_length_host);
+                max_length_host, split_msg_max_length);
         }
     }
     else if (weechat_strcasecmp (command, "005") == 0)
@@ -1109,7 +1140,8 @@ irc_message_split (struct t_irc_server *server, const char *message)
             split_ok = irc_message_split_005 (
                 hashtable, tags, host, command, argv[index_args],
                 (argv_eol[index_args + 1][0] == ':') ?
-                argv_eol[index_args + 1] + 1 : argv_eol[index_args + 1]);
+                argv_eol[index_args + 1] + 1 : argv_eol[index_args + 1],
+                split_msg_max_length);
         }
     }
     else if (weechat_strcasecmp (command, "353") == 0)
@@ -1128,7 +1160,7 @@ irc_message_split (struct t_irc_server *server, const char *message)
                     hashtable, tags, host, command, target, ":",
                     (argv_eol[index_args + 2][0] == ':') ?
                     argv_eol[index_args + 2] + 1 : argv_eol[index_args + 2],
-                    NULL, ' ', -1);
+                    NULL, ' ', -1, split_msg_max_length);
             }
             else
             {
@@ -1141,7 +1173,7 @@ irc_message_split (struct t_irc_server *server, const char *message)
                         hashtable, tags, host, command, target, ":",
                         (argv_eol[index_args + 3][0] == ':') ?
                         argv_eol[index_args + 3] + 1 : argv_eol[index_args + 3],
-                        NULL, ' ', -1);
+                        NULL, ' ', -1, split_msg_max_length);
                 }
             }
         }
diff --git a/src/plugins/irc/irc-server.c b/src/plugins/irc/irc-server.c
index 2e62d68b4..cdeb679a2 100644
--- a/src/plugins/irc/irc-server.c
+++ b/src/plugins/irc/irc-server.c
@@ -117,6 +117,7 @@ char *irc_server_options[IRC_SERVER_NUM_OPTIONS][2] =
   { "msg_part",             "WeeChat ${info:version}" },
   { "msg_quit",             "WeeChat ${info:version}" },
   { "notify",               ""                        },
+  { "split_msg_max_length", "512"                     },
 };
 
 char *irc_server_casemapping_string[IRC_SERVER_NUM_CASEMAPPING] =
@@ -2489,7 +2490,10 @@ irc_server_sendf (struct t_irc_server *server, int flags, const char *tags,
                                     (new_msg) ? new_msg : items[i],
                                     NULL);
 
-            /* split message if needed (max is 512 bytes including final "\r\n") */
+            /*
+             * split message if needed (max is 512 bytes by default,
+             * including the final "\r\n")
+             */
             hashtable = irc_message_split (server,
                                            (new_msg) ? new_msg : items[i]);
             if (hashtable)
diff --git a/src/plugins/irc/irc-server.h b/src/plugins/irc/irc-server.h
index bc96b3694..6fc42f7cd 100644
--- a/src/plugins/irc/irc-server.h
+++ b/src/plugins/irc/irc-server.h
@@ -84,6 +84,7 @@ enum t_irc_server_option
     IRC_SERVER_OPTION_MSG_PART,             /* default part message          */
     IRC_SERVER_OPTION_MSG_QUIT,             /* default quit message          */
     IRC_SERVER_OPTION_NOTIFY,               /* notify list                   */
+    IRC_SERVER_OPTION_SPLIT_MSG_MAX_LENGTH, /* max length of messages        */
     /* number of server options */
     IRC_SERVER_NUM_OPTIONS,
 };