Outlook not receiving emails until another is sent or opened?

[Guest]

I have users on Microsoft Outlook XP and 2003 (with Exchange 5.5) who do not
receive emails when they are sent. They will receive them only when they
either send an email or open another previously received email. We have had
this issue a few times and are unable to come up with a solution.

 

[Jeff Stephenson [MSFT]]

I have users on Microsoft Outlook XP and 2003 (with Exchange 5.5) who do not
receive emails when they are sent. They will receive them only when they
either send an email or open another previously received email. We have had
this issue a few times and are unable to come up with a solution.

The problem you're having is that the information (called "UDP packets")
that Exchange is sending to notify Outlook of changes to your mailbox is
being blocked by something - probably the Windows Internet Connection
Firewall. You can set the registry values in
http://support.microsoft.com/default.aspx?scid=kb;en-us;Q305572 (Outlook
2002) or http://support.microsoft.com/default.aspx?scid=kb;en-us;Q304849
(Outlook 2000) to cause Outlook to poll Exchange rather than waiting for
notifications.

 

[Guest]

It has something to do with Windows Firewall. Try disabling your Windows
firewall and see if that helps.