My postfix+dovecot setup is not offering LOGIN auth mechanism. Thus outlook desktop clients cannot connect to my server's SMTP port.

Posted November 12, 2017 4.3k views

I have a simple postfix with dovecot config that needs to support four or five domains with less than ten users in total. Everything is working for me, as my desktop is Mac. However I have realized that a partner of mine is unable to sent mail from my server, as he is using Outlook and Outlook needs LOGIN mechanism offered in ESMTP. There is no problem related to receiving mail from IMAP ports of Dovecot, but SMTP does not offer LOGIN…
I found out that I need to set “authmechanisms = plain login”, I did so and now
dovecot -n shows auth
mechanism as intended, but still there is no LOGIN mechanism on offer.
Help please and thanks in advance.

These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.

Submit an Answer
1 answer

I have the same problem !! It’s because the /etc/dovecot/dovecot.conf dont have the include to read the conf.d files.
Put the “auth_mechanisms = plain login” in /etc/dovecot/dovecot.conf