A 550 error indicates you are attempting to send mail using an ISPs SMTP
server, but you are not logged on or authenticated to that account. See
this link for more:
http://www.insideoe.com/problems/errors.htm#550relay

Also I earlier replied to your first posting. Did you not read that?
--
Jim Pickering, MVP, Outlook Express
https://mvp.support.microsoft.com/pr...8-1171988A62D6
Please deliver feedback to the newsgroup, so that others can be helped.
Thanks.


"Fred" <testing@testing1212mouse.com> wrote in message
news:wbIgf.13053$NN2.514@trnddc02...
>I set up a 2nd verizon account and get the following error message when
> trying to send email from it. Any ideas how to get it straightened out?
>
> The message could not be sent because the server rejected the sender's
> e-mail address. The sender's e-mail address was 'sample@verizon.net'.
> Subject 'Email Test', Account: 'sample@verizon.net', Server:
> 'outgoing.verizon.net', Protocol: SMTP, Server Response: '550 5.7.1
> Authentication is required to send mail as <xts738xg@verizon.net>', Port:
> 25, Secure(SSL): No, Server Error: 550, Error Number: 0x800CCC78
>
> (Note that I changed the email addresses in the above, but the error
> message
> is otherwise unchanged.)
>
> Thanks in advance.
>
> Fred
>
>