Our email server is Exchange 2003 in an AD network. Our spam filter is Trend Micro's ScanMail.
We are giving our sales reps a company email address and then forwarding all of it to their personal email address. To do this, we've been adding their external email address as a contact in AD, adding them as an AD user with an Exchange account, then all email sent to that user forwards to the contact.
This has been working fine, but they are signing up for spam using their work emails. And now, AOL keeps blocking us because we are forwarding some of that spam to them. Shouldn't AOL's mail server detect that we are not the original sender? Are there any suggestions as to how we could prevent this? I do believe that ScanMail is blocking some of it. It's just not doing a perfect job and it never will.
Update: I think my problem has been asked here. I missed that when I did my first search.