Greetings, I have a client who has an Exchange 5.5 server usung the POP3 service to collect mail from the ISP. Recently we had to change IP addresses for the DSL Line, now when we try and send email to any AOL address we recive the following error message: he following recipient(s) could not be reached: ***** <mailto:*****@aol.com> @aol.com on 9/9/2003 1:31 PM The recipient was unavailable to take delivery of the message The MTS-ID of the original message is: c=US;a= ;p=STRATEGICFRAME;l=STRATEGIC01-030909203106Z-319 MSEXCH:IMS:STRATEGICFRAME:STRATEGIC01:STRATEGIC01 3554 (000B099C) 554 please visit http://postmaster.info.aol.com. AOL is the only site we are having problems sending to. Justin Maas MixTec 206-579-0612 mailto:jmaas@xxxxxxxxxxxxx