No McAfee installed. I use Symantec for files/folders and GFI for SMTP AV/AS. For more clarification - when I say client I mean a different location with an Exchange server which can NOT send email to me. I tested by sending emails from another company/exchange server and attempting to establish a telnet connection via port 25. Some are successful and some are not. When I view the ISA logs > I see the connection open, then close without getting the Exchange SMTP header that I normally get. Joseph Danielsen, MCSA-Messaging, MCP Network Blade Inc. 49 Marcy Street Somerset, NJ 08873 ________________________________ From: isalist-bounce@xxxxxxxxxxxxx [mailto:isalist-bounce@xxxxxxxxxxxxx] On Behalf Of Ara Avvali Posted At: Thursday, January 18, 2007 5:18 PM Posted To: ISA Conversation: [isalist] SMTP Connection Closed Subject: [isalist] Re: SMTP Connection Closed A little bit off maybe but do you have mcafee corporate installed on the client which has problem? From: isalist-bounce@xxxxxxxxxxxxx [mailto:isalist-bounce@xxxxxxxxxxxxx] On Behalf Of ISA Sent: Thursday, January 18, 2007 1:47 PM To: isalist@xxxxxxxxxxxxx Subject: [isalist] SMTP Connection Closed Hope someone can help! I think this is an ISA 2004 (patched) issue. From some clients I can send/receive email just fine (and telnet port 25). But from other clients I can not. I monitored the ISA logs and observed the connection initiated then being closed. From Exchange 2003 box I shut of IMF and GFI services - still not luck receiving email or telnet'ing from a particular client. Any ideas would be greatly appreciated. Respectfully Joseph Danielsen, MCSA-Messaging, MCP Network Blade Inc. 49 Marcy Street Somerset, NJ 0887 732-213-0600