The message could not be sent. The authentication setting might not be
correct for your outgoing e-mail [SMTP] server. For help solving this
problem, go to Help, search for "Troubleshoot Windows Mail", and read the
"I'm having problems sending e-mail" section. If you need help determining
the proper server settings, please contact your e-mail service provider.
The rejected e-mail address was '(e-mail address removed)'. Subject 'tt',
Account: 'mail.comcast.net', Server: 'smtp.comcast.net', Protocol: SMTP,
Server Response: '550 5.1.0 Authentication required', Port: 587,
Secure(SSL):
Yes, Server Error: 550, Error Number: 0x800CCC78
btjohnny said:
The connection to the server has failed. Subject 'me', Account:
'mail.comcast.net', Server: 'smtp.comcast.net', Protocol: SMTP, Port: 25,
Secure(SSL): Yes, Socket Error: 10013, Error Number: 0x800CCC0E