Monitoring, Management & Location Tracking

If you can't send mail because the postfix mail server is stopped, then the best thing to do is find out why it won't start. A good command to run is this:

# postfix start

If you see an error like this: 

postfix: fatal: config variable inet_interfaces: host not found: localhost

you can change the inet_interfaces setting in /etc/postfix/main.cf from:

inet_interfaces = localhost

to 

inet_interfaces = 127.0.0.1

and postfix should start right up.