How to Fix Outlook 0x8004210B – Send/Receive Error

[arpitgupta136]

Help me to fix "0x8004210B " erron in Outlook

[VikramTheGreat]

Hi @arpitgupta136,

Welcome to the HP Support Community.
 

Thank you for reaching out. I understand you are seeing error 0x8004210B in Outlook. This error is generally related to Outlook having trouble communicating with the email server, particularly when sending or receiving messages. Microsoft also lists 0x8004210B among Outlook send/receive errors. 

Because Outlook is a Microsoft application, HP Support for the application itself is limited. However, we can certainly help rule out an issue with the HP computer, Windows, drivers, or network connection.

Please try these basic checks:

1. Confirm the internet connection. Open Microsoft Edge and make sure you can access websites normally. 
2. Open Outlook and check the status at the bottom. If it shows Disconnected, Working Offline, or Trying to connect, go to Send/Receive and make sure Work Offline is not enabled. 
3. Restart the PC and router, then test Outlook again. 
4. Make sure Windows is fully updated. Also check for available HP driver and BIOS updates using HP Support Assistant. HP Support Assistant can identify updates and provide troubleshooting tools for your HP computer. 
5. If you are using Classic Outlook, try starting it in Safe Mode by pressing Windows + R, entering outlook.exe /safe, and pressing Enter. This can help determine whether an Outlook add-in is contributing to the problem. 
6. If the problem continues, the email account's SMTP/server settings, account configuration, or Outlook profile may need to be checked. These settings depend on your email provider, so the email provider or Microsoft Support would be the appropriate point of contact for those settings. 

You can also review Microsoft's official troubleshooting guide here: I can't send or receive messages in Outlook | Microsoft Support

For HP-specific assistance with the computer, you can use: Official HP® Support

To help us determine whether there is anything specific to the HP system that needs attention, could you please provide the exact HP computer model/product number, your Windows version, and whether you are using Classic Outlook or New Outlook?

Also, please let us know whether the error occurs when sending, receiving, or both. If possible, a screenshot of the exact Outlook error would be helpful:

Please make sure the screenshot does not include your email address, phone number, or other personal information.

Take care and have an amazing day!