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Mozilla Thunderbird Not Sending Emails

Problem:

I get an error sending with Thunderbird, I can receive fine and I tried sending on Port 26 and it still does not work. How do I fix this problem?

Solution:

This error is most commonly caused by McAfee Antivirus, if you have McAfee running on your system, then you can follow these steps:

  1. Right-click on the McAfee System Tray icon and Select VirusScan Console
  2. Double-click Access Protection.
  3. Select Prevent mass mailing worms from sending mail. Be sure not to uncheck this box.
  4. Click on the Edit button.
  5. Add a comma at the end of the text box at the bottom of the window and then add THUNDE~1.exe. DO NOT PUT A SPACE BETWEEN THIS AND THE PREVIOUS ENTRY.
  6. Click OK.
  7. Click OK.
  8. Close the VirusScan Console window.

After this has been completed, you should be able to send e-mail again from Thunderbird.

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