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)
http://mvp.support.microsoft.com/def...le/vandermolen
"Can't send e.mails" <Can't send
> wrote in message news:411929EF-0625-4AD9-B017-...
> I'm receiving the following message:
>
> --------------------
> 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 'mensaje
> de prueba', Account: 'mail.tonymojena.com', Server: 'mail.tonymojena.com',
> Protocol: SMTP, Server Response: '550 relay not permitted', Port: 25,
> Secure(SSL): No, Server Error: 550, Error Number: 0x800CCC79