I am sorry if the problem has been addressed before, but i would like to know how is everyone dealing with SPAMCOP's bounce and autoresponder's issue. Despite of userchk, bounces are possible due to small things like over-quota (which is common problem for us running thousands of domain). Also Auto-responder are somehting that cannot be ignored and people do use them.
All i can find is the BOUNCEQUEUE patch, which is not feasible for us in correct situation.
So i would be thankful, if everyone shares his way to deal with this issue.