Fix Outlook 0x80040900 error during Send/Receive

Summary: Today, we are going to discuss most common Outlook 0x80040900 error faced by Outlook users. Furthermore, we will also discuss causes and some workarounds to fix or resolve the Outlook error 0x80040900, during send/receive.

MS Outlook is one of the most preferable email applications used to communicate within the small as well as large organizations. It helps users to send or receive emails, to-do, tasks, journals, etc. However, despite having many advantages, it has some flaws too. Sometimes, while sending or receiving emails, users often get Outlook “0x80040900” error which mainly occurs when users entered a wrong server name. The exact Microsoft outlook sending error 0x80040900 message displayed on the screen is shown below:

Receiving reported error (0x80040900) – ‘The server name you entered cannot be found on the network (it might be down temporarily). Verify that you are online and that the server name is correct.”

Primary causes for getting Outlook 0x80040900 error

There could be various causes or reasons behind the occurrence of the error 0x80040900, some of which includes:

  • Bad Network connection
  • Over-sized PST File
  • Virus or malware attack
  • The sudden termination of Outlook
  • Bad sectors on the storage device

Let’s discuss in detail:

Bad Network Connection: Due to the bad network connection, it’s not possible to connect with the server to receive or access Outlook PST files which may lead to inaccessibility of MS Outlook.

Large/over-sized PST File: Another reason for getting Outlook 0x80040900 error while sending or receiving emails is over-sized PST file. If PST file exceeds its limits, it may halt your Outlook application from functioning smoothly.

Presence of virus or other malicious software: If your laptop or desktop contaminated with any virus or other malicious programs, then the chances of corruption of Outlook PST files are very high. Hence, to avoid such issues, always use an updated or trustworthy anti-virus program.

The sudden termination of Outlook: Improper or sudden termination of Outlook application can damage your crucial Outlook data. Therefore, it is advised always close Outlook application when all the instances of Outlook get terminated.

Bad sectors on the data storage device: The data storage device including system hard drive, pen drive, an external hard drive can create bad sectors over time. Thus, if bad sectors are available on your system hard drive where Outlook PST files are saved, then it may get corrupt.

How to solve 0x80040600 error code in Outlook 2013, 2010, 2007 or 2003

Inbox Repair Tool

If your Outlook PST file gets corrupted, due to any of the above-mentioned reason, you can opt for scanpst.exe utility provided by MS Outlook. It helps you to repair corrupt PST file and fix Outlook error 0x80040900 with ease. However, you need to locate the location of Inbox Repair tool as it has a different location in the different version of Outlook and Windows.

Drawbacks of ScanPST.exe utility

  • Required technical knowledge to execute the scanpst.exe utility
  • Repairs only if the corruption is minor
  • Hard to locate the scanpst.exe utility due to a different location

Professional solution – LMbyte PST Repair tool

If you’re still not able to repair PST file or fix Outlook 0x80040900 error, then try a professional PST Recovery tool. It’s an effective tool that solves many Outlook errors efficiently. It is embedded with many prominent features, some of which includes:

  • Repair highly corrupted PST files
  • Restores entire data items including emails, attachments, calendars, contacts, drafts, etc.
  • Repairs large sized PST file
  • Supports entire Outlook editions


Of the above three methods, the third method is the most reliable and safe to perform as it ensures recovery of Outlook data and fixes the error 0x80040900.