using snmp process monitoring for health monitor of smtpd

I was setting up monitoring through nagios, and have snmp processes monitoring the smtpd and spam filter processes.

 

 

So the new question, is how can I get my snmp processes monitors on the system to trigger the F5 monitor that if two certain processes are down, to disable the smtp port?

 

 

This would be a win win in that I have both a spam filter processes and the smtp process that if either fails, to stop smtp. And the 2nd win is the maillog wouldn't be logging connection attempts.