McAfee is blocking email on SMTP port 25

By default McAfee Enterprise, and some other versions, automatically block port 25 by default. This is an Anti-MailWorm feature. To disable it, do the following:

  • Rt Click on the McAfee icon in your system tray
  • Select “Open VirusScan Console” or Manage Features > VirusScan Enterprise. Depending on the version you have.
  • Double click on Access Protection Properties, this will open the dialog for this area
  • Under Anti-Virus Standard protection there is a rule that is set to block, it is “Prevent Mass Mailing Worms from Sending Mail
  • Uncheck the box under BLOCK and you are all set….click ok, and try it again. A reboot is NOT needed.

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