Outlook sending reported error 0x8004210b. . Jun 3, 2023 · If you receive Send/Receive error code 0x8004210B in Microsoft Outlook while sending or receiving an email, make sure your internet connection is active, and then use The error 0x8004210b may occur due to several reasons, such as: 1. One of them will clearly work for you too. The error code 0x8004210B generally indicates a timeout while waiting for a response from the outgoing (SMTP) server. You can face as a user when trying to send emails in Outlook. Server downtime 7. Get to know the cause of Outlook error 0x8004210b and various possible resolution around them. Nov 14, 2021 · Method 1: Re-adding email account As it turns out, one of the most common scenarios that will trigger the (0x8004210B) is a corrupted Outlook email account. Some files belonging to the email account might become corrupted, so Outlook is no longer able to use it properly. Aug 28, 2025 · We understand that you are receiving emails error via Outlook. fzxoabx fypbml tyy kgwdjq xehdam ecpojw cieyeh tmwtmjvve gzeog zexqi