Thank you to everyone who provided assistance with regards sub-domain
aliases. The mailman mailing lists are working great now!
Finally, what are your general thoughts on being able to include non-
local addresses in the /etc/aliases file? Before, I sign up to the
developer mailing list I would like some feed back about this from
people who have more experience with the way postfix works.
After all, there could be a good reason that this file is only for
local mail. If anyone is able to explain why this is file is only for
dealing with local mail then I would be be most interested to know more.
You all provided great feed back. The postfix mailman community is
very helpful which is a really good for this kind of project.
Thank you again!