I recently installed SBS 2011 and Exchange 2010 on our server. Everything seems to be working with Exchange with one exception. We're having an issue with emails coming in from multiple users on the same domain. Occasionally they are delivered when they should be, but usually, I get everything that is sent during the day, all at the same time between 9:30pm and 2:00am. I have tried to find anything that could be causing it but am coming up blank. Any suggestions?

Check the messages headers and see the hops and see the time it takes to travel at each hop to start with Could be AV on Exch if youre got some deployed What version of Exch? SP? How nay Exch servers? AD side Exch setup?Sukh

Hi, If you install AV on exchange2010, it may get some delayed. Please use message tracking and queue viewer to check if there is message flow. Best Regards, Lisa.

Hi, If you install AV on exchange2010, it may get some delayed. Please use message tracking and queue viewer to check if there is message flow. Best Regards, Lisa.

And also use the ExBPA to do a health check Post back so we can help you IF you have Antivirus installed, make sure that the exceptions are done correctly http://technet.microsoft.com/en-us/library/bb332342.aspx Jonas Andersson | Microsoft Community Contributor Award 2011 | MCITP: EMA 2007/2010 | Blog: http://www.testlabs.se/blog | Follow me on twitter: jonand82

And also use the ExBPA to do a health check Post back so we can help you IF you have Antivirus installed, make sure that the exceptions are done correctly http://technet.microsoft.com/en-us/library/bb332342.aspx Jonas Andersson | Microsoft Community Contributor Award 2011 | MCITP: EMA 2007/2010 | Blog: http://www.testlabs.se/blog | Follow me on twitter: jonand82