Hi Aki,
I work on the thunderbird (TB) imap code and am not sure if this problem is
maybe something I've done wrong. Please see the information here:
https://bugzilla.mozilla.org/show_bug.cgi?id=1968384#c10
TB is known to work OK doing APPEND using gmail and courier which support
UTF8=ACCEPT but don't support LITERAL+. So dovecot 2.4 is the first server that
I've seen and used with TB that supports both UTF8=ACCEPT and LITERAL+.
When user Chris disables either UTF8=ACCEPT or LITERAL+ in TB it works OK with
dovecot 2.4. But when both are enabled, dovecot 2.4 rejects the APPEND data (as
you can see in the above logs).
LITERAL+ just adds a "+" to the length value in parenthesis. With LITERAL+
disabled the "+" is not included and the length is the same. Should maybe the
length be increased by 1 when the "+" is added? Or maybe TB is doing something
else wrong?
Note: I don't currently have an installation of dovecot 2.4 to test with
locally. I currently only have 2.3 from fedora 42.
--gene smith
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