58

When I compose and send an email (I always write plain-text emails) in Thunderbird, it always truncates my sentences and adds line breaks in the middle of my sentences.

How do I turn this feature off? It is quite annoying to me.

For instance, when I send people long URLs, the URL gets cut in the middle because of the automatic line breaks.

I am using the latest Thunderbird 9 for Mac OS X

  • 1
    I would have upvoted but no research effort was evident. – nslntmnx Jan 4 '18 at 3:20
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    @nslntmnx Sometimes it may be unclear even where to start researching. – Dr_Zaszuś Apr 23 '18 at 11:15
57

https://help.ubuntu.com/community/Thunderbird#Disable_word_wrapping_in_outgoing_messages

Disable word wrapping in outgoing messages

  • Edit -> Preferences -> Advanced -> General -> Config Editor
  • Set the preference called "mail.wrap_long_lines" to false

See also: http://kb.mozillazine.org/Plain_text_e-mail_(Thunderbird)#Flowed_format

... mail.wrap_long_lines to control the wrapping of long lines (defaults to true)

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    This did not work for me until I toggled mailnews.wrap_length to zero as well. Then it worked like a charm, even with wrap_long_lines to false. This answer did point me towards the Config Editor, which is a good thing. – Joost Aug 12 '13 at 13:36
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    Moreover, I had to close and re-launch TB to make it notice the new setting. For the record, this happened with TB 24 under Ubuntu 12.04 x64. – Marcello Romani Mar 11 '14 at 12:44
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    It's enough to close the mail window (save as draft, close and reopen if you do not want to start over). – fuenfundachtzig Jul 23 '14 at 9:42
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    @Joost, setting the "mailnews.wrap_length" to 0, actually did fix it for me. Thanks. – Vicer Mar 3 '15 at 22:17
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    As of Thunderbird 45.1 or earlier, the mailnews.wrap_length setting is now called mailnews.wraplength. – tanius Jan 20 '17 at 21:31
9

Setting mailnews.wraplength to 0 disables wrapping on compose window, but as a side-effect does not wrap sent messages.

I addressed this problem by setting:

mailnews.wraplength 0
mail.compose.wrap_to_window_width true
plain_text.wrap_long_lines true
view_source.wrap_long_lines true
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    Can you give an example of how it doesn't "wrap sent messages"? I'm wondering if I should use your settings or the basic mailnews.wrap_length version. – Paul Oct 25 '15 at 16:25
  • Was there a typo in this answer? In Thunderbird 45.1.0 there's mailnews.wraplength but not mailnews.wrap_length – Graham Perrin May 22 '16 at 11:22
  • I have amended the answer to use mailnews.wraplength – Freeman May 30 '16 at 5:57
  • It may work for you, but you reported some settings that say the exact opposite of what is asked. This smells like cargo cult. – ceztko Feb 20 '18 at 0:00
7

There is also an addon that can be used to disable the wrapping without messing with the configuration editor:

https://addons.mozilla.org/en-US/thunderbird/addon/toggle-word-wrap/

With this addon the wrapping can be toggled with CTRL+SHIFT+W (the message must be started in text mode, it doesn't work in HTML mode).

  • With Thunderbird 45.1.0 on KDE on PC-BSD 11.0-CURRENTMAY2016 I can enable that add-on but the resulting menu option is greyed out. – Graham Perrin May 22 '16 at 11:23
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    @GrahamPerrin Probably because you are in HTML mode (or switched to Text mode from the HTML mode after opening the new message) – Emmanuel Bourg May 23 '16 at 7:53
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    OK, the underlying problem may be that I have never successfully got plain text by default. I might find a workaround/fix for that elsewhere. Thanks. – Graham Perrin May 25 '16 at 16:59
5

Concerning URLs, it is actually sufficient to enclose them in < and >.

  • @chipperyman573 Question title: "Tell Thunderbird not to [...] wrap lines" question body "for instance [...] long URLs". One answer: put it between < and >. Not as good as the accepted one, yet a lot quicker and also working if you prefer to have the remaining text wrapped – Tobias Kienzler Feb 16 '14 at 8:04
  • Yeah I misread the answer, sorry. – Jon Feb 16 '14 at 8:08
  • @chipperyman573 no worries, I guess you saw it in the low quality queue, right? I'm also sometimes too quick there, that's why multiple votes are required after all :7 – Tobias Kienzler Feb 16 '14 at 8:14
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    Yeah, I flagged it and realized "I'm way to tired to be doing this" and took a nap. Didn't last long though sadly... – Jon Feb 16 '14 at 8:15
4

For me, the accepted answer did not show any effect.

As Joost pointed out in his comment, the correct solution is setting

mailnews.wraplength → 0

in the config editor (Edit → Preferences → Advanced → General → Config Editor...).

  • I think this should be an answer on its own, as Joost's comment might be overlooked and Freeman's answer adds more settings that are unnecessary for the addressed problem. – Scz Mar 24 '17 at 13:21
0

Open a msg to type. At the top Edit> Rewrap. Fixed! Found this by exploring everything when it suddenly starting happening to me.

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