0x80042109: Outlook Cannot Connect to Your Outgoing (SMTP) E-mail Server Error Fix

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The Outlook 0x80042109 error usually appears when a user tries to send an e-mail. In such scenarios, the email does not move outward and Microsoft Outlook begins to display an error message on the screen.

Experts point out that the 0x80042109 Outlook error code can be caused by corrupted temporary Internet files or infection by viruses/malware.

Error message: Task ‘SMTP server name – Sending and Receiving’ reported error (0x80042109): ‘Outlook is unable to connect to your outgoing (SMTP) e-mail server. If you continue to receive this message, contact the server administrator or Internet service provider (ISP).

Although the two messages are similar, they present two different scenarios. The first message indicates that you cannot send an e-mail from Outlook, but that you can receive incoming e-mails. On the other hand, the second message means that you cannot send or receive e-mail(s).

How to fix the Microsoft Outlook 0x80042109 error code:

Disable antivirus software


In addition, you should also try to disable your antivirus to fix the error 0x80042109. It is no secret that antimalware programs often conflict with other programs installed on the system. As soon as an error occurs, it is advisable to disable your antivirus. To do this, right-click the antivirus icon on the toolbar and choose Disable. To make sure it is completely finished, open the Task Manager (press Ctrl + Alt + Delete) and check that there are no antivirus-related processes.

Change the settings of the email account

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  • Open Outlook, click on the file and choose Account Settings.
  • Then find your email account, double-click it and select Edit.
  • Select Other settings, then select Advanced settings.
  • Change the Outgoing Server (SMPT) value from 25 to 587 in the window you are viewing, which provides additional security against scanners.
  • Then set the encryption to TLS, click OK, then click Next and Finish.

Change the output port

By default, the value of an outgoing SMTP (Simple Mail Transfer Protocol) port by default is set to 25. Many ISPs are likely to block this port value, so you will not be able to send emails. You have two options in this scenario:

– Change the SMTP value to 26.

– Switch to the TLS port and dial 587.

The second option is a non-standard port value, but it has effectively fixed the error 0x80042109 for many users. Follow these steps and it could solve it for you:

  1. Open Outlook.
  2. Select Tools.
  3. Open the account settings.
  4. Double-click on the defective e-mail address.
  5. Choose Further options.
  6. Open Advanced.
  7. Set the SMTP port of the outgoing server to 587 and select TLS encryption.
  8. Confirm your selection and search for changes.

Repeat this procedure for each e-mail address that receives the error message (0x80042109).

MS Outlook is an effective email client, but when it comes to performance, it is also vulnerable to various problems. It is important to solve any type of problem as quickly as possible. In the section above, we have explained some simple but reliable methods that users can use to troubleshoot the Microsoft Outlook 0x80042109 error. Fine manual solutions are reported as automated solutions for the solution of transmission errors Outlook 2016, 2013, 2010, 2010, 2010, 2010, 2007.


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