Hi William,
> So how would I relay e-mail through his domain name that I am hosting
> on my server without having to list his IP each time?
>
> Is there a "relay after POP" option in BlueQuartz?
In the GUI interface see "Server Management" / "Network Services" / "Email".
That page has a "Basic" and an "Advanced" tab.
In the "Advanced" tab you find a checkbox for "POP Authenticated Relaying",
which is what you're asking for.
But rather use "Enable SMTP Auth" (see the "Basic" tab). When "Enable SMTP
Auth" is checked, email is relayed if the user athenticates against the SMTP
server with a valid username and password. All email clients support that
method and it works considerably better than "POP Authenticated Relaying",
which is just a dirty hack anyway.
--
With best regards,
Michael Stauber