Windows 10: Outlook send files error 0X800CCC0F

I cannot send emails through Office 365 Outlook. I get an error: 0X800CCC0F. I can received emails, but not send them.

:)

 

Outlook 365 Fails to send message 0x800ccc0F


I am using Outlook version 1812 build 11126.20196. This morning a wrote an e-mail and my system is unable to send it, I keep getting error 0x800ccc0f or 0x8004210B. Outlook keeps trying to send this e-mail over and over again. I have looked out those codes and followed the suggestions, even re-installed office and nothing helps.

I wrote the same e-mail again and it was sent out with no problem. I would like to delete this e-mail that is causing the problem, but it is NOT in the outbox. *cry I am getting tired of this send/receive error messages.

Help please,
Ak

 

Cannot send smtp emails from Mail app or Outlook(error 0x8009030f 0x800ccc0f)

Didn't help.

On Outlook 2019, the error message I get is: 0x800ccc0f

 

Outlook 365 Fails to send message 0x800ccc0F

Good evening, Al. I can tell ya that Outlook is the problem child of Office 365 2016. It's given me nothing but grief since I've had it, but the rest of Office is just fine.

For a couple months, every time I opened Outlook, I was forced to give my password. Since the last cumulative update for 17763, the password demand has stopped; however, I have one email address that Outlook seems to have lost its ability to collect mail for. I get the following message when I try to get mail for that address.





Edit: This is a dual boot machine, and on my Insider partition with Build 18312, Outlook seems to behave quite nicely and I can collect email for all my email addresses.