Related Pages

RSS Feed Knowledge Base Feed

Page Options

The message could not be opened from Outbox folder

Problem Description:

You are unable to send emails with Outlook express or Windows Mail with Trend Micro internet security 2008 or 2007 installed. You receive an error message saying the following:

"The message could not be opened from Outbox folder. Account: 'POP3Server', Server: 'SMTPServer', Protocol: SMTP, Port: 25, Secure(SSL): No, Error Number: 0x800420C8"


Cause of the Problem:

It appears to be that some copies of Trend Micro internet security have been set to "Warn Only" instead of a deny or allow for SMTP traffic. Microsoft Outlook Express or windows mail does not properly handle the failure to send so it returns an error saying that it cannot open the outbox file.

Your Ad Here


Adjust your firewall settings in Trend Micro Internet Security.

  1. Open up Trend Micro internet security.
  2. Click on Firewall Controlls.
  3. Click on Personal Firewall Settings.
  4. Click on Advanced Settings.
  5. Click on the Network Protocol control tab.
  6. Look through the list under description for a "Outgoing Mail Mass Mailing (SMTP)" rule.
  7. When you find it click on edit.
  8. On the edit screen under response click on "Allow".
  9. Press Ok, and then you can close out of the other Trend Micro Windows

Related Programs and Devices:
Trend Micro Internet Security , Windows XP , Windows Vista , Outlook Express , Windows Mail

Last Updated: 03/18/2008 12:34 AM

blog comments powered by Disqus