49

Whenever I compose a new email message in Thunderbird, it defaults to the Western (ISO-8859-1) encoding, and I have to manually change it to UTF-8 every time.

How do I change the default?

1

In Thunderbird 78+:

Menu > Options > General > Language & Appearance > Advanced button > Text encoding

Text encoding settings in Thunderbird 78

2
  • Thank you for the updated answer that applies to more recent versions of Thunderbird! :) – hpy Apr 7 at 1:14
  • Don't you just love how it seems to change in every... single... version... ? ;p – Charles Roper Apr 8 at 0:48
55

Tools → Options → Display → Formatting → Fonts → Advanced... → Character Encodings → Outgoing Mail:

Screenshot

4
  • 5
    Well, that is somewhat illogical to put it there … Thanks! – Martin Ueding Mar 31 '12 at 20:22
  • 6
    In linux it's Edit > Preferences > Display... – ChocoDeveloper Feb 2 '13 at 3:20
  • 3
    Agreed that it's illogical : you'd expect it to be in "Composition", not "Display". Completely defeats principle of least surprise. They could at least adopt a prefs dialog like Eclipse that will filter to aid discovery of obtuse settings. – Adrian Dec 1 '14 at 15:40
  • Display... on THEIR machine! – Worthy7 Apr 13 '17 at 4:19
13

For Thunderbird 17 on the Mac, you can find this setting at:

Thunderbird > Preferences > Display > Formatting > Advanced

Look at the Character Encodings section, as seen here:

enter image description here

2
  • Regarding your comment; I did test it and it is the very same path, only with Edit except Thunderbird under Icedove@Debian and the dialog also looks the same (except for the theme, obviously). – bitmask Jun 27 '13 at 5:32
  • Great. Add a new answer with screenshot. – james.garriss Jun 27 '13 at 12:32
5

On Mac OS X you have to use the Config Editor (also know as about:config) found in Preferences -> Advanced -> General. Change the value of the preference named mailnews.send_default_charset to UTF-8.

0

On Thunderbird 68:

Edit>
    Preferences>
        Display>
            Formatting>
                Font & Colors>
                    Advanced (button) > 
                        Text encodings      
2
  • Thunderbird, not Firefox. Are the menus the same? – Karu Jan 8 at 18:54
  • Sorry I meant Thunderbird. – xenoid Jan 8 at 20:27

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