The most common causes of these error messages are problems with Internet connectivity and account settings configured incorrectly in Outlook or Outlook Express.
Perform the following methods in order. If one method does not resolve the issue, move on to the next one. The methods are as follows:
Method 1: Start Outlook in safe mode
Method 2: Create a new e-mail profile
Method 3: Delete suspicious messages from your mailbox
Method 4: Check your antivirus vendor’s Web site for additional suggestions
Method 5: Remove, and then reinstall Outlook Express
Method 6: Verify that all SMTP e-mail addresses in a distribution list are valid
Method 7: Examine the configuration of your firewall software
If your antivirus solution includes an e-mail scanning feature, you may have to perform additional configuration tasks to use Outlook or Outlook Express with the antivirus e-mail scanning feature.
Antivirus software that is known to have caused this problem includes products by the following vendors:
- Symantec (Norton)
- McAfee
- Trend Micro (PC-cillin)
- Panda
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