Dovecot trouble "Aborted login (tried to use disallowed plaintext auth)"

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#1 Mon, 03/23/2015 - 09:26

Dovecot trouble "Aborted login (tried to use disallowed plaintext auth)"


I set up a new virtualmin gpl server last night, backed up my sites and transferred them over.

All is well except for pop mail - when I try to access my mail, I get this in the mail log:

dovecot: pop3-login: Aborted login (tried to use disallowed plaintext auth): user=<>, rip=, lip=, session=

This is on a CentOS 7 server set up last night. I don't see any dovecot config settings that look any different than were on my previous server. Authentication methods is set to 'Plain-text' and the Password authentication source is set to: 'Default PAM service (dovecot)'.

Suggestions please?


Mon, 03/23/2015 - 10:10


It sounds like plaintext auth is currently disabled on your setup. In theory that should be allowed by default -- though your setup is actually more secure in preventing it :-)

One way to resolve that would be to enable SSL in the pop3 protocol that your email client is using.

You can also use SSL over IMAP.

Alternatively, you could edit your Dovecot config (usually "/etc/dovecot/conf.d/10-auth.conf), and make sure this parameter is set:

disable_plaintext_auth = no

Then restart Dovecot.


Mon, 03/23/2015 - 21:22

That was it Eric, just had to adjust my email program. Thank you!

Not sure why plaintext auth is apparently disabled on my server though, looking at the settings, I would expect it to be enabled,


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