setting up a mailing list?

I have been looking for information or a FAQ for setting up a mailing list of my own.. I would like to compose a list that used PGP encryption by default supported a key-server swap like enviorment with online extraction of specific keys, as the server lists are huge and PGP's extract and sort routines often do not work on them and when they do take quit long.. information and direction needed, recommended, and thnaked for.. -Paris