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Dovecot-lmtp Connection refused

Issue : Mails are not delivering to Roundcube OR any other webmail and the Logs showing the following error.


Oct 16 19:27:45 postfix/error[30545]: DF7YHSA90: to=<>, relay=none, delay=924, delays=924/0.13/0/0, dsn=4.4.1, status=deferred (delivery temporarily suspended: connect to[private/dovecot-lmtp]: Connection refused)


Cause : “lmtp” protocol not correctly enabled on the server

Fix : Please go the “/etc/dovecot” and search for all the files for the string “protocols”.

Command and Output :

root@ubuntu:/etc/dovecot# grep -irl “protocols”

Please make sure that lmtp is enabled /etc/dovecot/dovecot.conf as given below.


protocols = imap lmtp


Also make sure that there is no duplicate entries added in other files.

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