Outlook 2010 has worked without issue for more than a decade and I have no intent to update the application. Yesterday, I was trying to change my DNS service and the problem first occurred after I changed a few E-mail account settings and clicked ‘Test account settings’. This issue I am having is that when I try sending an email, I get: Task 'Pair of Docs Email - Sending' reported error (0x800CCC0F) : 'The connection to the server was interrupted. If this problem continues, contact your server administrator or Internet service provider (ISP).'



I found some online articles related to this issue and have tried everything they suggested. No luck. I also made sure that all DNS records are exactly as they were before I made the changes in Outlook.

I turned off the firewall, restarted Outlook, but same issue. Since I do not have AV running on this machine, so that is not the issue. The problem is not the ISP since I was able to send email from another computer and I am still receiving email. I then installed another email program on this computer, copied the SMTP information from Outlook, and was able to send an email.

I ran scanpst on my outlook.pst file, but nothing was found. I also installed the demo version of Wondershare RepairIt and it claimed to have found something, but would not save the modified pst file unless I bought the program.

I then renamed the outlook.pst file and replaced it with a month-old backup copy, but I still had the exact same issue. I have checked the account stings and they are correct. I even rebooted the computer, but that didn’t help. I tried starting Outlook in safe mode, but got the same error. Some stuff talked about the ost file, but I am unable to locate such a file on my computer.

I tried running 'repair' from setup.exe, but ran into a myriad of issues - all cannot locate file' such-and-such, even when i picked the directory the file was in. I then found the ISO file and reinstalled Outlook, but the issue persists.

What the heck is going on?????

It just started working again - not sure what the issue was. The only thing I can think of is that the capitalization of the username was different...