Empty Postfix Mail Queue

This command will delete one specific email from the mailq (taken from the postsuper man page) 

mailq | tail +2 | grep -v '^ *(' | awk  'BEGIN { RS = "" } { if ($8 == "email@address.com" && $9 == "") print $1 } ' | tr -d '*!' | postsuper -d -

I use a few scripts that check the status of our servers and email/page me if they don't respond. This led to a problem when I was offline for one reason or another. I would get a ton of messages sent to the postfix queue which would all be sent out when I reconnected to the internet. Deleting the postfix mail Queue is suprisingly easy:

sudo postsuper -d ALL

The other thing that helped with this was checking for a local network connection before doing the server checks. This is done with the following.

ifconfig | grep netmask | grep -v 127.0.0.1 | awk {'print $2'}L