Virtual Hosting & E-mail...

OK - the question is as follows;
        I've set up my DNS server on my AS/400 to server for several
more domains, and it's serving them properly from the HTTP server.  What
are the steps I need to do so my POP server receives the E-mail?  Anyone
curious can perform an Nslookup on WWW.AS400NUT.COM but I'm also
receiving E-mail on WWW.CTLALTDEL.ORG which is working fine.  The "host"
setting on the mail DNS screen I've tried putting WWW.CTLALTDEL.ORG
should I have had the WWW.AS400NUT.COM instead?  Also - I added the host
entries on the AS/400 hosts table, but it only listens to the first 4,
so I've entered them into "virtual IP addresses" since the AS/400 just
needs them to exist...

Am I missing something else?

Domains are as follows;
AS400NUT.COM
RIBBONDEAN.COM
BEVYBOARDS.COM
HOUNDLOVER.COM
FULLVOICE.NET
HORSENBUGY.COM
SIX9ERS.COM

Any thoughts?  They all serve my web page from my HTTP server, so they
respond... but something is missing...

Andrew Borts / Webmaster
Seta Corporation
6400 East Rogers Circle
Boca Raton, FL 33499

E-mail: Andrewb@setacorporation.com
Corporate web site http://www.setacorporation.com
E-Commerce web site http://www.palmbeachjewelry.com
                              http://www.myfreeitems.com
Voice: 561-994-2660 Ext. 2211 / Fax: 561-997-0774