Tanstaafl skrev den 2020-07-15 21:28:
On Tue Jul 07 2020 02:07:08 GMT-0400 (Eastern Standard Time), Mark
Constable <ma...@renta.net> wrote:
FWIW I meant if the client is Windows7/old-Outlook then changing either 993/SSL or 143/STARTTLS to 143/NONE could help pick up the mail. We had
to do this for a 100 or so clients a few months ago after upgrading to
Ubuntu 20.04.

Really, really bad idea. You just disabled an/all security on your imap
connection.

windows 7 just need tls 1.0, why its need to disabled all, is aswell beyong me, do not disable tls 1.0 in dovecot aslong one have windows 7 clients

upgrade all clients to windows 10, then tls 1.0 and more weak tls 1.1 can be disabled in dovecot

hope the best for all

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