a tool/script to print the biggest mail servers in queue

[Simon K. Grabowski]

I have noticed that whenever a large mail server is down
(i.e. mail.com or yahoo.com) queue gets much bigger.
This is normal and understandable, but sometimes a huge
queue lags message delivery to mail servers that are working okay.

Is there a tool / script that'd print the biggest mail servers
in queue. i.e. in a list...
yahoo.com    5684 (messages in queue)
mail.com    1243 etc.

I know that postfix has a tool that does that...

What about qmail?


-- Simon