I'm looking for alternatives to Yahoo Groups. I like the Yahoo Groups features of archiving messages, having a place to archive files, and being able to schedule events (with automatic reminders) on a calendar. Ranked features from most to least important are: 1. One email address which reflects to everyone on the list. 2. Closed list (only members can send email, joining list must be approved) 3. Calendar reminders Nice, but not necessary: 4. File archives 5. Message archives There are a few drawbacks of Yahoo Groups. First, I want to add/remove people to the list without the list member having to do anything special. Some of the members of my lists have email but are computer-challenged. Second, Yahoo Groups sometimes gets bogged down and timely messages (like calendar reminders) don't go out when scheduled. My group of volunteers has no funding, so very cheap, preferably open-source suggestions are most appreciated. Thanks! -Jeff