We upgraded from 3.0.1 -> 3.1, and TLS in SMTP stopped working. In the web console "Use TLS Auth only" is not checked.
When this setting is checked, both TLS and non-TLS SMTP connections seem to work (Thunderbird 1.5 client)
In Zimbra 3.1.0 The zmmta.cnf reads:
POSTCONF smtpd_tls_auth_only VAR zimbraMtaTlsAuthOnly
POSTCONF smtpd_use_tls VAR zimbraMtaTlsAuthOnly
TLS is not enabled unless zimbraMtaTlsAuthOnly is set. Is this correct? Shouldnt smtpd_use_tls = yes always?