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 'hous-436221345@craigslist.org'. Subject
'$550 ***********************ROOM FOR RENT***********************', Account:
'mail.bresnan.net', Server: 'mail.bresnan.net', Protocol: SMTP, Server
Response: '473
hous-436221345@craigslist.org relaying prohibited. You should
authenticate first', Port: 25, Secure(SSL): No, Server Error: 473, Error
Number: 0x800CCC79
Posts: n/a