new mail server

howardshaw wrote:
>
> I've set up a new incoming mail server but when i send mail to it using
> my isp as my outgoing mail server i get the following response.
>
> 553 sorry, that domain isn't in my list of allowed rcpthosts (#5.7.1)
>
> ________________________________________________
> See http://PLUG.phoenix.az.us/navigator-mail.shtml if your mail doesn't post to the list quickly and you use Netscape to write mail.
>
> PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us
> http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss

This is a spam prevention measure. You need to check your
mail before you send it. That way I can't masquerade as
you and send mail through your mail server. SMTP does not
have any kind of authentications, so the only way the mail
server knows who you are is if you POP your mail fist. POP
has authentication.

George