There was a problem loading the comments.

Outlook error (0x80042109) while sending messages

Support Portal  »  Knowledgebase  »  Viewing Article

  • 11 March 2014 2:20 AM

Error Message

Sending reported error 0x80042109 Outlook cannot connect to your outgoing SMTP email


This error is caused by either

  1. SMTP Server not specified correctly - Please check you mail server name specified in the email client's settings
  2. SMTP port 25 being blocked by ISP - In Outlook (email client), in Settings change SMTP port
    from 25 to alternate port 26 or TLS port 587

  3. Your IP address being blocked on server's firewall - Please login to customerportal and unblock your public IP address
Should the error still persist, you can contact technical support and provide Teamviewer QuickSupport (free download from ) access to your PC for further investigation.

Share via
Did you find this article useful?  

Related Articles


Add Comment

Replying to  

Self-Hosted Help Desk Software by SupportPal