I have got an SBS 2003 setup that is running Exchange 2003. Everything has been working fine untill last couple of days. I have installed ISA server from the Premium Tools then realised that it would be more prudent to install this in a VM / Test environment, so I uninstalled ISA. The issue that I am facing now is when email is processed, whether it is external or internal, it sits in the "message pending submission" queue for about 6 minutes and then delivers normally. When I turned on message tracking then I can see that the pause is between:
10.00 SMTP; Message submitted to advanced queuing
10.06 SMTP; Started message submission to advanced queuing
I dont have any antivirus application on the server as this is handled by a barracuda spam filter. Is there anyone who can share some idea to fix this issue? Thanks.