Debugging Send Error in Outlook 2013 (0x800CCC13)

Question

Sending' reported error (0x800CCC13) : 'Cannot connect to the network. Verify your network connection or modem.'

I have just upgraded to win10 and keep getting this error when trying to send email. Strangely, sending is confirmed as working when I 'Test Account Settings'.

The accounts are POP3.

Here's what I've tried:

• Starting Outlook in safe mode "Outlook /safe"
• Disabling all add ins
• Unintegrating ESET from all emails related things
• Disabling firewall and disabling anti virus
• Deleting and recreating the email accounts
• Creating a new Outlook profile
• Creating a new Data File in Outlook

I am running out of things to try - could anybody point me in the right direction to debug this?

Answer 1

Finally, and just after posting, this I sorted it.

I got the answer from here: http://www.msoutlook.info/question/cannot-send-after-windows-10-upgrade

Essentially you need to run sfc /scannow from the command prompt run under administrator access. Then restart. This repairs some files after upgrading to 10.