Do you allow Fowarders?
We used to allow fowarders till we had customer that used AOL.
They fowarded their email to their AOL account.
As the spam came in their AOL account they marked it as spam and got our email servers blocked at AOL.
It took 16 hours of hard work to get the servers unblocked from AOL.
So the answer is NO we do NOT allow fowarders at this time.