I'm having the same problem, got the error message:
The connection to the server has failed. Subject 'test', Account:
'mail.comcast.net', Server: 'smtp.comcast.net', Protocol: SMTP,
Port: 25, Secure(SSL): Yes, Socket Error: 10060, Error Number: 0x800CCC0E
Confirmed that port 25 is being used for outgoing, 110 for incoming.
Uninstalled McAfee, still have the same problem
Are you using any AV (virus) scanner for your incoming\outgoing mail? I read that you did remove McAfee but is there a chance there might be another scanner still in place
Yes, I uninstalled McAfee and the Norton that came loaded on the HP. So I
only have the windows security as far as I can tell. Is there something in
that I should change? My mail provider is Comcast.
Did that. Also turned of Windows Defender and Firewall. Rebooted. Added
back in account, got the following error message:
The connection to the server has failed. Subject 'test', Account:
'mail.comcast.net', Server: 'smtp.comcast.net', Protocol: SMTP, Port: 25,
Secure(SSL): No, Socket Error: 10060, Error Number: 0x800CCC0E