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 Removed)'. Subject 'Re:
Welcome to email', Account: 'pop3.silomail.com', Server: 'smtp.silomail.com',
Protocol: SMTP, Server Response: '550 Blocked by SPF ()', Port: 25,
Secure(SSL): No, Server Error: 550, Error Number: 0x800CCC78

Silo is a wireless ISP. Were you sending from home when that error
occurred? If yes, give Silo a call, because for some strange reason their
mail server sees you as a potential spammer.

--
Gary VanderMolen, MS-MVP (Mail)


"seven01" <(E-Mail Removed)> wrote in message news:115398DF-2F4D-424B-AB15-(E-Mail Removed)...
> 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 Removed)'. Subject 'Re:
> Welcome to email', Account: 'pop3.silomail.com', Server: 'smtp.silomail.com',
> Protocol: SMTP, Server Response: '550 Blocked by SPF ()', Port: 25,
> Secure(SSL): No, Server Error: 550, Error Number: 0x800CCC78