OT: Bounced Email

[Johnny Stork]

I know this is not striclty a MS question, but it is an issue with mail 
on my MS server, and with so many knowledgable mail admins on this list 
I thought I might have success here.

For a couple years now (yes I should have tried to fix this long time 
ago), I have been having trouble with pretty much all of the lists I 
subscribe to, including vanlug. I seem to get the messages from 
vanlug-bounces+lists=myaddress.com at robomod.net, or 
clug-talk-bounces at clug.ca and of course 
mailscanner-bounces at lists.mailscanner.info etc. Certainly this has 
something to do with my own mail servers but I route through a couple 
machines so am not sure where to start looking for the problem. Mail 
does of course get through fine,  just seems to be when I send mail to, 
or receive mail from, mailman listservs?

I dont want to include one of the entire probe emails since there is a 
great deal of server/host info but if someone is willing to give me a 
hand, and take a look, please email me off-list and I can send you one 
of the probes showing all the header details.

Thanks to anyone that can help with this.