Some customers had some problems with bad Exchange performance when McAfee GroupShield 7.0 Patch 1 is installed. McAfee released a new hotfix called: Hotfix 491164
Information about the hotfix:
McAfee GroupShield 7.0 + Patch 1 for Microsoft Exchange
Microsoft Windows 2003
Microsoft Windows 2008
Microsoft Exchange 2003
Microsoft Exchange 2007
After starting the McAfee GroupShield 7.0 service, delays may be experienced with email processing. If the GroupShield service is stopped, mail delivery and processing returns to normal levels.
One of the processes used by GroupShield, (the Postgres process), takes an extended time to complete its I/O (input/output) operations. As a result, the GroupShield reporting threads have an extended waiting time which increases the RPC Averaged latency and results in a delay while processing email messages.
This issue is resolved in Hotfix 491164 for McAfee GroupShield 7.0 + Patch 1.
Hotfix package name: GSE7HF491164.ZIP
For more information: https://kc.mcafee.com/corporate/index?page=content&id=KB66095
Little note: Hotfixes are created to address specific issues and are not posted publicly, but are available by contacting McAfee Technical Support. I installed the hotfix and it’s resolved my problem.