Timeout while communicating with the server – Error 0x800ccc19.Operation timeout – without response from receiving (POP) server – Error 0x8004210a.Outlook unable to connect to outgoing (SMTP) e-mail server – Error 0x80042109.Unexpected termination of server connection (due to server/network problems or inactivity for long time) – Error 0x800ccc0f.
Connection to the server interrupted- (Sending/Receiving Error 0x800ccc0f).No connection made (target machine refuses).Some of the most common errors in Outlook are noted here (in very brief words): Many other errors like 0x800ccc0b are displayed by Outlook while sending or receiving messages. Some Common Outlook Errors and Their Solutions Also, you can send test emails to each member (of the distribution list) to check if that email address is valid or not. To fix this error, you should check and verify all the SMTP email addresses in Outlook distribution list. The 0x8004210b is displayed in Outlook when an SMTP address in the distribution list is incorrect or corrupted. Meanwhile, you can try some general methods for fixing the most common Outlook errors (mentioned in the last part of this article). You may refer to the documentation/website of the anti-virus provider to get the detailed steps.
To prevent the error due to Antivirus software scanning configuration, disable ‘Scan incoming Email’ and ‘Scan outgoing Email’ options.