Outlook send receive error 0x8004210e can occur when there is an issue with the connection to the mail server or when the mailbox is full. Here are some troubleshooting steps to resolve this error:
Check Internet Connection: Ensure that you have a stable and active internet connection. Open a web browser to verify connectivity.
Verify Account Settings: Double-check the account settings in Outlook. Verify the incoming and outgoing mail server addresses, ports, and authentication settings. Contact your email provider if you need assistance with the correct settings.
Clear Outbox and Increase Server Timeout: If there are large or stuck emails in your Outbox, delete or move them to a local folder. Additionally, increase the server timeout settings to allow more time for the server to respond.
Delete Unnecessary Emails: If your mailbox is nearing its storage limit, it can cause the error. Delete unnecessary emails or move them to local folders to free up space.
Disable Antivirus/Firewall: Temporarily disable any antivirus or firewall software as they can sometimes block Outlook's connection to the mail server. If the error is resolved after disabling the software, adjust the settings accordingly.
Repair Outlook Data Files: Run the Inbox Repair tool (scanpst.exe) to scan and repair any corrupted Outlook data files, such as the PST or OST files.
Check Server Status: Verify if the mail server you are using is experiencing any issues or downtime. Contact your email provider to confirm the server's status.
Update Outlook: Ensure that you have the latest updates installed for Outlook. Updates often include bug fixes and improvements that can resolve various errors, including the Outlook error 0x8004210e.
By following these steps, you can effectively troubleshoot and resolve the Outlook send/receive error 0x8004210e and resume normal email functionality.