I don't know if this functionality is already available, I am new to Xoops. If it is could some one let me know where.

Basically I want a system that lets registered users mail new forum topics (actually new anything would idea) into the forum, and also sends new posts and comments out to every user.

This functionality occurs in Yahoo groups. Basically a user can sign up to recieve no emails, recieve special notices, recieve a daily digest of all the happenings in their groups, or recieve every individual message in ther mail as it is posted.

They can also mail in new forum topics or, by replying, add comments to existing topics.

It seems to me that this is simplfied in Yahoo as each group only has one main forum that just has lots of different threads, but I it also seems to me that it should be possible in something like XOOPS simply by using the Node ID as a way of adding comments to existing things. I don't know how you'd deal with new posts. In Yahoo you simply cchange the subject line and thus post a new topic.

Anyway, this functionality would be great to have in XOOPS if it doesn't already exist.