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Windows 10 Outlook 2016 error 0x800ccc0f RRS feed

  • Question

  • Outlook is not sending certain emails with file attachments. It dose not matter if it is a .PDF or .XML or .jpeg Outlook will error and not send the email. This dose not happen all the time but it is frequent enough to be an issue. For example, an end user tries to send an email with a file attachment and it will not go through right away but after several hours the email pushes through. Or the email never sends and we have to recreate the email and it will sometimes send the recreated email and others it gets stuck in the out box with the error. Our IT department has already done the following possibilities and the issue remains. 

    Steps to get rid of Outlook error 0x800ccc0f:
    1. Check Your Internet Connection
    2. Switch Off Anti-virus Software
    3. Switch Off the Windows Firewall
    4. Increase the Server Timeouts Setting in Outlook
    5. Run Outlook in Safe Mode
    6. Repair Outlook PST Files

    There weren't any issues a few months ago. Is there a bug in a office update or windows update? Dose anyone have any other ideas as to what could be the issue?

    Tuesday, November 12, 2019 4:24 PM

All replies

  • Hi,

    Are these attachments large in size?

    Error 0x800CCC0F while sending or receiving email usually caused by Antivirus software scanning email, And antispam scanners may cause Outlook to return this error as well. I see you have done this operations.

    In order to check if this is a server issue, please try working on your webmail for a while and see if the issue will be reprofuced.

    Besides, a corrupted profile can also cause this issue, so it is also suggested to create and use a new Outlook profile via Control Panel > Mail > Show profile and see if there is any difference.

    The MTU (Maximum Transmission Unit) size of the router may create this problem while sending or receiving specific emails. Also, verify it and make some modifications to outgoing email size accordingly.

    Hope this can be helpful.

    Regards,

    Aidan Wang


    Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.


    Wednesday, November 13, 2019 3:05 AM
  • The file size is under 10mb. We have turned off the Antivirus but the issue is still there.we also created a new PST file to see if that would fix the problem but the user still has the same issue. We are going to try and change the user over to a different switch and see if that will help.
    Wednesday, November 13, 2019 3:16 PM
  • Hi,

    It has been a while, how is everything going?

    Have you tried my suggestions? What's the results?

    If there is any update, please feel free to post here.

    Regards,

    Aidan Wang


    Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.

    Friday, November 15, 2019 8:40 AM
  • Hi,

    Have you got the issue fixed?

    I'm writing to see if the reply above is helpful to you. If yes, would you mind helping mark the reply as answer? So that others who might have a similar question can benefit from your thread? Thanks for your understanding and support.

    Regards, 

    Aidan Wang


    Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.


    Monday, November 18, 2019 9:13 AM
  • No we are still looking for a solution.
    Monday, November 18, 2019 1:57 PM
  • We can send the emails with attachments fine on WiFi but When we are on a hardwired connection we have the error 0x800CCC0F. We have tried putting the end user on a different switch but the error still occurs. We have tried the following:

    1. Check for Internet Connections

    2.Disable MS Windows Firewall. You can follow the steps  given below to disable the firewall.

    -Goto Control Panel, then Network Connections

    -Right click on Internet connections

    -Click on Properties on the Menu

    -Click on Security and disable the firewall

    3. Check for Outlook Profile settings: Check for Outlook Profile settings and correct them.

    4- Try removing the emails from Outlook that you feel are suspicious.

    5- Also try opening Outlook in Safe Mode. This can also resolve the issue.

    6- If you are sure that the error is caused by corrupt or damaged file, then try using the inbuilt Inbox Repair Tool.This way you can repair the minor corruption issues in file.

    However, the issue persists. Anyone have any other suggestions as to why it works when using WiFi but not on a Hardwired connection?

    Monday, November 18, 2019 5:52 PM
  • Hi,

    Are these attachments large in size?

    Error 0x800CCC0F while sending or receiving email usually caused by Antivirus software scanning email, And antispam scanners may cause Outlook to return this error as well. I see you have done this operations.

    In order to check if this is a server issue, please try working on your webmail for a while and see if the issue will be reprofuced.

    Besides, a corrupted profile can also cause this issue, so it is also suggested to create and use a new Outlook profile via Control Panel > Mail > Show profile and see if there is any difference.

    The MTU (Maximum Transmission Unit) size of the router may create this problem while sending or receiving specific emails. Also, verify it and make some modifications to outgoing email size accordingly.

    Hope this can be helpful.

    Regards,

    Aidan Wang


    Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.


    Hi,

    Have you tried my suggestions above? What's the result?

    >> Anyone have any other suggestions as to why it works when using WiFi but not on a Hardwired connection?

    Maybe you can try another cable.

    Regards,

    Aidan Wang


    Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.

    此致,

    敬礼

    Wednesday, November 20, 2019 8:40 AM
  • We replaced the patch cable in the server room and we also replaced the cable in the end user's office but there is still trouble with sending the email via hardwire connection. We noticed the users who are on OS version 1809 do not have any issues with sending emails via hardwire but users who are on OS version 1903 do. Is there a unknown bug with the new 1903 update for windows 10?
    Wednesday, November 20, 2019 1:06 PM
  • Hi,

    I've researched a lot and currently haven't found any official articles about this. If possible, please try going back to an earlier build of Windows 10 via Start Menu > Settings > Update & Security > Recovery and test if your PC are updated less than 10 days.

    If your PC was updated more than 10 days, then it is suggeted to keep an eye out for updates.

    Regards,

    Aidan Wang


    Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.

    Thursday, November 21, 2019 1:48 AM
  • Hi,

    Have you got the issue fixed?

    I'm writing to see if the reply above is helpful to you. If yes, would you mind helping mark the reply as answer? So that others who might have a similar question can benefit from your thread? Thanks for your understanding and support.

    Regards, 

    Aidan Wang


    Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.


    Friday, November 22, 2019 8:39 AM
  • Hi,

    Here I will provide a brief summary of this post for your information. This will make answer searching in the forum easier!

    Request/Expectation:

    Windows 10 Outlook 2016 error 0x800ccc0f 

    Solution Summary:

    You may try going back to an earlier build of Windows 10 via Start Menu > Settings > Update & Security > Recovery and test if your PC are updated less than 10 days.

    Reference Links:

    No.

    Regards, 

    Aidan Wang


    Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.



    Tuesday, November 26, 2019 6:21 AM