Send Dovecot logs to rsyslog

[Nicolas Fo]

Hello,
I'm trying to send Dovecot logs to a Graylog server.
To do this, I'd like to pass logs to rsyslog and rsyslog pass logs to
remote Graylog server.
I set in dovecot.conf : syslog_facility = local5.info
I set in rsyslog.conf : local5.info           @192.168.xxx.xxx:5555
Restarted services and it doesn't work.

I use nmap to test if port 5555 is opened and this port is open.

What missed I ?

Thanks

Nicolas