Forwarding to AOL has been turned off server wide. Basicly the address @aol.com was changed to @SORRY_NO_AOL_FORWARDING_AVAILABLE in the config file which handles aliases. This looks like it affected about 200 domains accross all servers.
Anyone who needs the function to forward email to AOL will need to log in to cpanel and change it back.
Many big companies are forbiding the forwarding of email to AOL because once the mail arrives there, the user who had it forwarded marks it as spam and gets their entire server blocked by AOL. A
quick search at google will show this to be the case.
We are not big, so are just disabling it, forcing users who need it
and understand that they shouldn't mark mail coming from their server as spam, even if it IS spam.
This is a half measure to preventing it altogether, which we will have to do next if it remains to be a problem. But cannot call AOL every other day to get mail servers unblocked, because eventually they will assume we ARE spammers and refuse to unblock the servers.
The problem arrises due to a half decade long problem with the way AOL handles mail that their users mark as spam. AOL doesn't look for the server of origin to determine the actual server that sent the spam, they just look at the last server the spam touched. That last server is your server, just before you forwarded it to your AOL account.