I have a few domains hosted on my Raq4i and one of them sends out a weekly email newsletter with about 5000 names on (this is a double opt in list... just so you know i'm not supporting spam!)

Here is the problem... With a list of that size there are going to be many bounces each week (for whatever reason.. closed account, mailbox over limit, etc.) When the mail gets bounced back, about half of it bounces back to the domain that sent it... the other half bounces back to MY main server admin account (the default drop.)

I'm sure this has to be a email configuration problem, but I can't seem to be able to track it down and put my finger on it.

The mailing list program uses SENDMAIL if that matters at all.

Thanks in advance for your help!