avast! upgrade (7.0.1426) – Cannot send email from Outlook workaround

If after upgrading to Avast! Antivirus 7.0.1426 causes emails not to send from Microsoft Outlook, try the following steps as a work-around:

  1. Close down Outlook
  2. Open avast! user interface by clicking on the icon in your system tray (near clock)
  3. Under Real-Time Shields (on the left), click Mail Shield.
  4. Un-check “Scan outbound messages”.
  5. Click the “Stop” button. Wait 30 seconds.
  6. Click Start Button.
  7. Open Outlook and see if your message sends.

Source: My experience on Windows XP Pro SP3 and Microsoft Outlool 2003 SP3. GoDaddy’s outgoing mail server ( was involved and still gave me problems after the avast! setting changes. I switched to my ISP’s outgoing mail server The combination between the mail server and the avast! changes got me back up although I’m not completely sure why.