Especialy over one of our offices that still has email directly from the Internet (from their old ISP) without passing throught the mail servers I have here.
They receive lots and lots of viruses every day (they receive and send lots of email to all the world), which can clearly let me get a hint of the storm outside!
I'm going to try a shortcut by using fetchmail to fetch their mail, clean it and then feed it to the new mailboxes, while the switch over the new email addresses isn't completed....
I just hope it works or else I'm running out of ideas to easy-up the pression over them and the individual antivirus software...