I would like ot build a site which can read & post:
1. Newsgroups or usenet posts from some usenet server
2. Mailing list emails
You are free to use any software package you wish. However I hope that you are familiar with newsgroup settings & pop3 kind of email setting for mailing list. Choice is urs.
Here is a site I find very close to what I want: [url removed, login to view] , they can read newsgroups and mailing lists.
For mailing lists I will be using gmail to store my mails, so read gmails pop3 access guidelines if you need to.
I have a install of vbulletin on which we can easily add [url removed, login to view] if required. However you need to spend time configuring it. (if you choose to go vbulletin route).