Am 12.07.2016 um 16:24 schrieb Admin Beckspaced:
i just upgraded dbmail from 3.1.17 to most recent stable 3.2.3

with the old version 3.1.17 i could do an IMAP account setup in
thunderbird with SSL/TLS on port 993

with the new version 3.2.3 thunderbird now throws me an error that this
connection type is not supported by the IMAP server.
if i then switch to STARTTLS on port 143 all is working fine.

before i start into debugging this on my server ...

is this the expected behavior with the IMAP TLS setup in 3.2.3?
is SSL/TLS on port 993 not supported?
is STARTTLS on port 143 the only supported encryption?

if not ... how can i best debug this issue? what do i need to do to make
SSL/TLS on port 993 work again?

just run a proxy in front of dbmail like dovecot (i guess nearly everybody still using dbmail does that for a long time to avoid different troubles)

that way dbmail has no need to deal with anything in context of TLS and 143 with STATTLS as well as 993 with the wrapper work and the same for POP3

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