We're seeing a few errors from Outlook users after upgrading to Windows 10, specifically a message reporting problems sending messages. The affected users receive error 0x800CCC13.
'Task 'email address alias@domain.com- Sending' Cannot connect to the network. Verify your network connection or modem.'
Microsoft is looking into it, but one fix we know works is to open a command prompt as an administrator and run sfc /scannow. Reinstalling or repairing the Office install, making new profiles and other common troubleshooting steps will not fix this issue.
To use the System File Checker right click on the Start button and select Command Prompt (Admin). (You'll need to click Yes to allow it to make changes to the computer.)
When the Command Prompt appears, type (or paste) sfc /scannow then hit Enter (there is a space between sfc and /).
Once System File Checker is finished, reboot the computer.
Users are reporting that System File Checker reports corruption in mlang.dlI.Mui and Windows.Media.Speech.UXRes.dll.mui. SFC replaces the files and after a reboot, Outlook works again.
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278 Comments on "Outlook can't send mail in Windows 10: error Ox800CCC13"
error Ox800CCC78"
I have tried ''sfc /scannow'' twice They both stopped at 57%
Did you try making a new profile?
If you use 3rd party security software that installs outlook addins, try restarting outlook in safe mode - if it works ok, then an addin is the likely cause, 3rd party security addins are often the cause.
The scan worked and problem solved...many thanks.
HI, I am having trouble sending a batch of emails from QuickBooks, they are sending fine when I send them individually. I have outlook 2016 and Windows 7
Other causes of sending problems that are not specific to windows 10 and outlook are at https://www.slipstick.com/problems/after-viewing-outlooks-outbox-the-messages-in-it-wont-send/ and https://www.slipstick.com/problems/common-problems-that-cause-email-to-stay-in-the-outbox/
Is it the same error message? If not, what error message do you receive? What exactly happens?
When you say you can send ok individually, are you also sending from QuickBooks or just directly from Outlook?
Tried the sfc method as well as a complete reinstall of office to no avail
Did you reboot?
WIN 10 and Outlook 2016 - Can't send any emails!!!!!!! I have tried everything from SCANNOW to un-selecting "My outgoing server (SMPT) requires authentication" , "Logon using XX" NOTHING works and yet I have no issue with the same email account (att.net) on work IPHONE and and on my web based yahoo email account. Come on now Microsoft!!!!!!!!
Can you download mail sent to the account? Did you verify the server name and port # are correct?
Try using smtp.mail.yahoo.com and port 465 or 587 (requires SSL/TLS or Auto)
I am completely stuck. I have tried the above fix method, talked to Comcast and Microsoft, reinstalled outlook, and the 2016 app WILL NOT SEND EMAILS.
This is ridiculous- this is my work email, this isn't reliable and now I don't know what to do. It just won't send an email and when I click "send and receive" it says "not implemented"
Did you do a repair of your installation? That usually fixes the not implemented error.
What version of Outlook do you use?
Thanks so much for this solution. I spent hours yesterday trying to get outlook to send on my husbands brand new Windows 10 laptop. Was not popular. Found this post this morning and everything solved. Genius!