Dovecot mail-filter execution error.

[use experience]

Hello,


While using mail-filter plugin, I am getting following error. Please help
me.


Mar 31 07:48:31 ip-172-31-29-173 dovecot: lda: Error: userdb lookup:
connect(/var/run/dovecot/auth-userdb) failed: Connection refused

Mar 31 07:48:31 ip-172-31-29-173 dovecot: lda: Fatal: Internal error
occurred. Refer to server log for more information.