In our organisation,we migrated from Exchange Server 2003 that was on Windows 2003 to Exchange Server 2010 on Windows 2008. During the migrattion, we discovered that Exchange Server 2010 uses dedicated SSL port 443 which is also being used by McAfee antivirus. We then opted to use port 442 for Exchange 2010. Since we did this the mails have been going out and coming in but it takes time for them to go out of the queue. The better thing is that the mails are queueing up but at times they stop going through and after restarting the server and restarting some services, they go slowly. I think I have explained cleary what the situation is all about. What is the reason for this? Help please.

Are you talking about internal mails or external? Plain text mail or mails with attachments?Gulab | MCTS-MCITP Messaging: 2010 | MCTS-MCITP Messaging: 2007 | MCC 2011 | Skype: Gulab.Mallah

In this case I'm talking of External mails (mostly).

My concerns is about why Mcafee uses port 443, let Exchange use it's ports and change on the 3rd part products instead. Maybe this isn't any issue in this case, but as a recommendation I would change on the 3rd part's instead :) Also, for troubleshooting this issue I would recommend that you uninstall any 3rd part products and validate that everything works like it should before deep divingJonas Andersson | Microsoft Community Contributor Award 2011 | MCITP: EMA 2007/2010 | Blog: http://www.testlabs.se/blog | Follow me on twitter: jonand82

Hi I can’t find official test document about Mcafee . So you can try to uninstall mcafee and test your exchange server again. I don’t know whether Mcafee can scan message and impact speed of exchange server. This is the AV software list. http:/www.msexchange.org/software/Email-Anti-Virus/ This is about File-Level Antivirus Scanning on Exchange 2010 http://technet.microsoft.com/en-us/library/bb332342.aspx Regards! Terence Yu