here is my error 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 '(E-Mail Removed)'. Subject 'Fw: Welcome
to Windows Mail', Account: 'incoming.verizon.net', Server:
'outgoing.verizon.net', Protocol: SMTP, Server Response: '550 5.7.1
Authentication Required', Port: 25, Secure(SSL): No, Server Error: 550, Error
Number: 0x800CCC78

Make sure you have send authentication enabled.
Go to Tools, Accounts, select that account, Properties, Servers.
The box for "My server requires authentication" must be checked.

--
Gary VanderMolen, MS-MVP (Mail)


"receives but not sends "authentication"" <receives but not sends "authentication"@discussions.microsoft.com> wrote in message
news:AD921E9C-B34B-4E3B-8AE1-(E-Mail Removed)...
> here is my error 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 '(E-Mail Removed)'. Subject 'Fw: Welcome
> to Windows Mail', Account: 'incoming.verizon.net', Server:
> 'outgoing.verizon.net', Protocol: SMTP, Server Response: '550 5.7.1
> Authentication Required', Port: 25, Secure(SSL): No, Server Error: 550, Error
> Number: 0x800CCC78

Contact your ISP for the correct settings.

receives but not sends "authentication"" <receives but not sends
"authentication wrote:
> here is my error 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 '(E-Mail Removed)'. Subject 'Fw:
> Welcome
> to Windows Mail', Account: 'incoming.verizon.net', Server:
> 'outgoing.verizon.net', Protocol: SMTP, Server Response: '550 5.7.1
> Authentication Required', Port: 25, Secure(SSL): No, Server Error: 550,
> Error Number: 0x800CCC78