McAfee Antivirus Blocks SMTP Traffic

Last week I was installing and configuring MS Exchange in my SharePoint development farm so I can test email notifications in a Visual Studio workflow. I started scouring DNS and did find that I had forgotten to add the MX record for my Exchange server. That still didn’t fix the problem – but was still necessary. The rest of the day was spent verifying that SMTP was configured properly and no other routing issues were found. I finally started looking over other possibilities on the server and found the culprit – McAfee Antivirus. In the Virus Scan Console you need to go to open the Access Protection properties. In there you’ll see a setting that is titled “Prevent mass mailing worms from sending email”. You can edit that setting and add an exclusion for SMTP which resolved the problem. I am enclosing links to articles that provide a step-by-step walkthrough of the topics I mentioned in this post.

Comments (3)
  1. We have always opted for the last option and excluded the w3wp.exe process so SharePoint was able to send emails.

  2. Ajay Patani says:

    I had also the problem with my SMTP, the information that you eff supposition in the mentioned articles is rattling adjuvant. Now I can use my SMTP computer without any obstruction.

  3. It might be worth typing up a Technet Wiki article for this.

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