DNS or SMTP Settings

[Jim Reid]

>>>>> "Warphead" == Warphead  <warphead at iname.com> writes:

    Warphead> The question I have is, "Is the SMTP server with the
    Warphead> lowest MX preference, by default have to be the mail
    Warphead> server that delivers the mail?"

Yes.

    Warphead> If this DMZ SMTP server scans and filters them traffic,
    Warphead> then how does the email eventually get to the "real"
    Warphead> email server?

You configure the mail system to forward the mail to some internal
system behind the DMZ.