Outlook Express Not Sending Emails

If the emails are not being sent from the Outlook Express email client, perform the troubleshooting steps given on this web page.


Internet connection:

  • Step : 1 Start any web browser on your computer and check if it has a stable internet connection.
  • Step : 2 If not, troubleshoot the network connectivity problem.

Server settings:

  • Step : 1 Navigate to the Tools menu and choose the Accounts option.
  • Step : 2 Select your email account and click the Properties option.
  • Step : 3 Click the Servers tab, go to the Outgoing Mail (SMTP) section, and check if the correct information is entered in the Host name field.
  • Step : 4 Also, check if the ‘My server requires authentication’ option is selected.
  • Step : 5 Go to the Settings section and then you can mention a different username and password to that of the incoming mail credentials.
  • Step : 6 Navigate to the Advanced tab, go to the Outgoing Mail (SMTP) section, and check if the ‘This server requires a secure connection (SSL)’ option has been selected.
  • Step : 7 The Outgoing Mail (SMTP) field must be filled with 465.

File size:

  • Step : 1 The sent items can have a maximum size of 2 GB.
  • Step : 2 If it exceeds, you cannot send the emails.
  • Step : 3 So, try to move the emails from the Sent Items folder to the other one.
  • Step : 4 Now, check if you can send the emails from the Outlook Express email client.


  • Step : 1 Close the Outlook Express application on the computer.
  • Step : 2 Go to Windows Explorer, search for the Outbox.dbx file, and change its name to Outbox.old.
  • Step : 3 Check if the issue has been resolved. If not, carry out the simple instructions mentioned here.


  • Step : 1 Antivirus software installed on the computer might interfere with the Outlook Express email client and create the problem.
  • Step : 2 Disable the antivirus program and try to send the email.
  • Step : 3 Set up your firewall settings in such a way that both the Outlook.exe and the msimn.exe files have the permission to access the internet.
  • Step : 4 Repair the Outlook Express application.
  • Step : 5 Also, try to start the program in safe mode.
  • Step : 6 Still, if you cannot send the emails from the Outlook Express email client, contact our technical experts in resolving this problem by clicking the Call button provided below.


Our website offers instructions only for learning/reference purposes. The brands, product images, content, or any trademarks on this site are only for reference purposes. The company reserves all legal rights to change any content on the website at any time without any prior notification to the users. The website might include links for third party sites, and the users can use the link at their own risk. Our website does not guarantee the nature and accuracy of the content on such third-party websites.

mail settings net