INFORMATICS

Błąd podczas łączenia się z serwerem postfix

telnet adres.domeny 110

ERR Plaintext authentication disallowed on non-secure (SSL/TLS) connections.

Disconnected for inactivity

If you are unable to login to your/their email accounts and the system shows this error message:

Plaintext authentication disallowed on non-secure (SSL/TLS) connections

1. Edit dovecot configuration file: /etc/dovecot.conf and update the below changes

disable_plaintext_auth = yes
TO:
disable_plaintext_auth = no

Check in

/etc/dovecot/conf.d/10-auth.conf

and make sure that

disable_plaintext_auth = no

/etc/dovecot/conf.d/10-ssl.conf

ssl=yes

not  -  ssl =required

3. Restart dovecot and exim Mail server
/etc/init.d/exim restart
/etc/init.d/dovecot restart