Currently when I send messages containing non-ASCII characters such as 中文 or emojis like 😡, even when the receiving server clearly supports 8BITMIME, the Thunderbird Android client downgrades them to quoted-printable encoding. This results in unnecessarily bloated message bodies, reduced readability in plain-text views, and a generally less efficient email experience.
It would be a meaningful improvement if Thunderbird Android could make use of 8-bit content transfer encoding when:
Adopting 8-bit encoding when it’s safe and supported would:
Ideally, this behavior could be toggled in settings, e.g., via a “Prefer 8 bit encoding when supported” option under composition or account preferences.
Thanks for considering this enhancement—it would go a long way toward making Thunderbird even more capable for global and emoji-rich communication.