If all the attack was with nul sender, then if you could do a compound check of
If ( nul sender AND <msn ip> ) then block That would allow most valid mail to pass. Len To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/
