Had the same problem once. as it turns out .. AOL is very stick about being able to reverse resolve the senders address to an IP. in my case the mail was set to be sent as user@xxxxxxxxxxxxxxxxx changing it to user@xxxxxxxxxx allowed AOL to successfully reverse resolve that and it started to flow. hope that helps -Jay Mobley -----Original Message----- From: Michael Dunnicliffe [mailto:michaeld@xxxxxxxx] Sent: Monday, December 03, 2001 9:03 AM To: [ISAserver.org Discussion List] Subject: [isalist] Can't send mail to AOL customers http://www.ISAserver.org I'm using ISA 2000 and Exchange 2000. Clients can send mail to anyone but AOL email names i.e. anyone@xxxxxxxx Please help ------------------------------------------------------ You are currently subscribed to this ISAserver.org Discussion List as: jmobley@xxxxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub')