Solving Thunderbird sent mail line wrapping issue

When using Thunderbird to send a email(not replying), I found out that it has a line wrapping issue, which means when you read that on the webpage, there are unnecessary line breaks that are not what you intended to do. For example, when I want to send this line of paragraph.

This is an email that is sent by Thunderbird with wraplength of 0.

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100

However, when I read what I’ve sent, it could be something like this.

I tried to search on this issue and many people talk about find the Option menu, however for newer version of the Thunderbird, I could not be able to find this Option menu, until I found this post, so it is at the bottom of the Thunderbird preferences, on the lower right corner.

I then configurated the following part in Config Editor, you want to make sure that you click the blue button to confirm you saved it:

mailnews.wraplength=0

This is what your outgoing email looks like after changing the parameter:

I’m not sure why Thunderbird would not make this a default one, since replying emails would not cause extra line breaks, but somehow I still have to live with this app as it can be used cross platforms.


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