limit all traffic but email?

I have 2 Ethernet port “bridged” MT acting as a Bandwidth Control Unit, limiting traffic by IP address via simple queues. My email server is on another network. I have the email server’s IP address and I’m using the standard ports; 110 and 25.

How can I continue to control all NON-email traffic but give unlimited bandwidth to the local IP’s when it’s email traffic?

If at all possible, I would like to continue using simple queues (for the “simple” part).

Use mangle and queue tree

Regars

So…just mangle all traffic outbound for the email server and create an unlimited queue?

This new queue will have a higher priority then the simple queues?

Or maybe…I just need to create a simple rule with mail server as the “Target Address” and the limits set to “unlimited”, AND make it the first rule in the list. DUH!