Make sure you have send authentication enabled.
Go to Tools, Accounts, select that account, Properties, Servers.
Enable the "My server requires authentication" option.

--
Gary VanderMolen, Microsoft MVP (Mail)
Microsoft MVP Program: http://mvp.support.microsoft.com


"pixiechick" wrote in message ...
I haven't been able to send emails for months. My internet provider and
router has been checked and everything is ok on those ends.

Here is my error message and it is the same for anyone I try to send to.

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 '. Subject 'test',
Account: 'pop-server.neo.rr.com (1)', Server: 'smtp-server.neo.rr.com',
Protocol: SMTP, Server Response: '530 Authentication is required before
sending [R0107005]', Port: 25, Secure(SSL): No, Server Error: 530, Error
Number: 0x800CCC78