0x800ccc0f error outlook 2019 - works wired, error wireless

Hello, 

We know of an issue with older drivers for Intel wireless devices that may be causing the issue that you are experiencing. You can either update the drivers, along with the Killer Control Center here - https://support.killernetworking.com/download/killer-control-center/ or you can update your Intel Wi-Fi drivers from Dell here - https://www.dell.com/support/home/us/en/19/drivers/driversdetails?driverid=vg6m5. There is no 20.70.0.5 version of the Killer Network Service, but that is a very common, older Intel Wi-Fi driver version. 

If that doesn't resolve the issue for you, we encourage you to contact us directly here - http://support.killernetworking.com/submit-a-ticket/ - so that we can help you further!

-- Anthony with Killer Networking and SmartByte Support

Thank you, thank you, thank you!!!  I've got a new Alienware 17 R5 running Windows 10 Pro.  I have scoured the internet and YouTube since receiving my new computer in January and finally you have provided me with a solution.  I stopped my "Killer Network Service" and BAM! instantly sent mail from Outlook 2019.  Fantastic!  Thank you again!

I had the same problem as kk_1 and have spent days searching and trying out solutions that haven't fixed the send email error 0x800ccc0f in Outlook 365.

Dilbertdad you are a STAR!!!!

I am running a Dell G3 3779 x46 and it has installed SmartByte Drivers & Services 2.0.643 and when I stop the service emails are sent without problem but as soon as I start the service the error occurs.  This I think is the latest version looking at the link you have posted so looks like an uninstall for me as well.  As others have said, this is SHOCKING, the amount of time that has been spent resolving this issue has cost me dearly! Not impressed by Smartbyte

Have you also updated your Intel Wi-Fi driver from here? https://www.dell.com/support/home/us/en/19/drivers/driversdetails?driverid=vg6m5

-- Anthony with Rivet Networks

I had this exact same problem on my "new" Dell (August 2018) and "fixed" by disabling the SmartByte Network service (thanks to Dilbertdad on another thread). Then I worked with the Smartbyte support folks and tried a new yet to be released version of SmartByte. When that didn't work they asked for my Wireless Device driver info and found the version I was using had a known bug. I updated by Wireless Device driver to the latest version and Outlook and Win 10 Mail now works fine. My adapter and driver info:

Network Adapter type: Intel(R) Wireless-AC 9462

IntelDrivers:

Old Version:Driver Date 6/25/2018

Driver Version 20.70.0.5

New version:

Driver Date 1/14/2019

Driver Version 20.120.0.4

Note that I'm still running the yet to be released version of SmartByte Drivers and Services - 2.5.713. Hopefully the older version of SmartByte works with the new Wireless Device driver for others. 

Hey Belldaj,

You should be able to solve the "Killer Performance driver Suite UWD cannot be installed with Killer Ethernet Performance Suite" issue by clean-installing the latest suite, using this guide - https://support.killernetworking.com/knowledge-base/clean-install-killer-control-center/. If you still encounter that error, make sure you also try the guide for using the Microsoft Fixit, linked at the bottom. 

Please note that this only applies to Killer Networking adapters, not SmartByte-related issues. 

-- Anthony with Rivet Networks

Thank you for the solution.

I purchased a new Dell  Inspiron and migrated my files and programs.  None of my IMAP emails accounts could send emails on outlook 365.  I tried changing the ports, deleted/restored my email accounts, checked my virus software, and spent a day and a half with no success. I had the same settings in my old Lenova and it worked just fine. When I saw your post,  I deleted SmartByte and presto, in less than 2 minutes my problem was solved.

Why would Dell add software that won't allow gmail  accounts to work properly???

I really appreciated your post.  Thanks again. 

Ed

I had the exact same problem (Outlook was unable to send e-mail when connected via wifi) with my brand new Inspiron 15 7000 (7586). Disabling the SmartByte service also fixed the problem for me.

After coming across this thread, I updated to the latest driver (version 20.120.1.1) for my Intel Wireless-AC 9560 card and also ran the SmartByte update from Dell (upgraded to version 2.0.615.0). Note that I had some challenges upgrading SmartByte. When I ran the SmartByte update, it only gave me the option to Modify, Repair, or Uninstall. I chose the default, which I think was Modify. When I tried to run SmartByte following that process, it simply showed a window indicating that SmartByte needed an update and asking me if I wanted to go to the Dell support website (which is what it did before I ran the update). So, to be sure, I re-ran the SmartByte update, selected Uninstall, rebooted, then ran it again to re-install it. After that, when I ran SmartByte, it actually started and I was able to confirm the version number. 

After all of that, Outlook was able to send mail with SmartByte enabled.

However, I've chosen to uninstall SmartByte, as I don't believe I need the value it is supposed to add, and I'd rather have a simpler software configuration.

Dell does not support Outlook or Thunderbird  etc.

So Its dubious at best to say that "dell supplied software" is the problem.

Check your antivirus manufacturer's website for additional suggestions
Configure your firewall software to enable Outlook to access the Internet
Make sure that your email profile works correctly
Start Outlook in safe mode
Run the Inbox Repair Tool to repair your .pst file
Clean up email messages that are stuck in your Outbox
Run the MAPI Repair Tool
Verify all SMTP email addresses in the distribution list
Increase the server time-out setting