E-mail settings problems


Operation System: Ubuntu Server 20.04.02

Zammad version: 3.6.0

Aim: Connect Zammad ticketing system with corporate mail server MS Exchange 2010.

Problem we encounter: Unable to configure incoming mail with IMAP protocol.

Bug shown by Zammad: SSL_connect returned=1 errno=0 state=error: unsupported protocol

Additional information: We use IMAP protocol, with SSL/STARTTLS = Yes, Port 993

User credentials for IMAP entered in Zammad: test@contoso.com , contoso.com\test (MS Exchange 2010)

Nothing we tried or changed did not help us.

Following protocols are disabled on MS Exchange mail server: Server protocols: SSL 2.0, SSL 3.0;

Client protocols: SSL 2.0, SSL 3.0

Your exchange server has to support your Zammad servers ciphers.
Ubuntu speaks, as far as I’m aware TLS1.2 and TLSv1.3 only.

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