Sorry for getting the two mixed up. As I said in my original post, I'm new to linux and server administration so my knowledge on server daemons is limited to say the least.
netstat -l | grep smtp:
tcp 0 0 *:smtp *:* LISTEN
tcp6 0 0 [::]:smtp [::]:* LISTEN
unix 2 [ ACC ] STREAM LISTENING 10413 private/smtp
unix 2 [ ACC ] STREAM LISTENING 10455 private/bsmtp
The output of netstat -l | grep subm was empty.