Outlook 0x80040900 Error During Send/Receive Fixed

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The Outlook “0x80040900” error often occurs if you have incorrectly specified the mail server name (or ports) in the Outlook account settings, or if you cannot reach the mail server due to Internet connection problems. In all these cases, you will receive the following error message during the Outlook sending/receiving process: “Task’[email protected]’ – Receiving a reported error (0x80040900): The server name you entered cannot be found on the network (it may have temporarily failed) Check if you are connected and if the server name is correct”.

Today we will discuss the Outlook error 0x80040900, which is defined by MS Outlook in a certain way on the screen at the time of its appearance:

The server name you entered is not found on the network (it can be temporarily disabled). Check that you are online and that the server name is correct.”

Troubleshooting Error 0x80040900

It is not easy to see the exact reason for this Outlook error message. However, the following are the highest possible reasons why the Outlook 0x80040900 error occurs:

  • No or little Internet connection;
  • Incorrect mail server settings;
  • Problems with antivirus and firewall settings;
  • Damaged PST file; etc.

Main causes of getting Outlook 0x80040900 Error

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There may be several causes or reasons for the occurrence of the 0x80040900 error, some of which include :

  1. Poor network connection
  2. Oversized PST file
  3. Virus or malware attack
  4. The sudden shutdown of Outlook
  5. Defective sectors on the storage unit

Make sure that you are connected to the Internet and that you can specify the SMTP port number.

Start an Internet browser. Or ping the google.com; ping www.google.com. You should get an answer as below if the computer is connected to the Internet.
Enter one of the following addresses in the address bar and press Enter.
Also check the proxy settings.

Adding an email account in Microsoft Outlook

Create a new outlook profile

There are several steps to correct the Outlook 0x80040900 error in different versions of MS Outlook.

First of all, add an email account in Microsoft Outlook and there are two ways to add it, one is to use the automatic approach and the other is the manual approach.


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