I am looking to set-up a mailing list for a group of people but was hoping there is a way to have sub-lists. For example, I'd like to have one group be everyone, then another group that is regional. I was thinking of " group-all@mydomain.com" for messages covering everyone but they could send a message to "group-sacramento@mydomain.com" to and it will only go to those that are interested in "Sacramento" specific messages. I would like to make subscribers opt-in or opt-out of the regional. At this point, I have not selected a hosting service yet. I wish to bring my own domain to wherever I choose. I'm not sure if someone that just advertises that they use Mailman is sufficient or if I need to find a hosting company that provides shell access for setup is what I need. I'm sure there is some Wiki or something if this sub-lists works but I must be using the wrong search term for what I want.
Another thing that is important for me is I do NOT want to archive or cache messages, at least for not much more than a day. For me, I work for a large corporation. While it is a large corporation, those of us wishing this list are like bastard step-children. We work with others from the same corporation but we operate under completely different rules and a different hierarchy. We seldom see each other because there is usually only one of us working in an area at a time and we are spread out geographically. We are represented by the same union that the majority of the employees of the corporation are represented by, but since we do not have a common work area, we have no way of having "water-cooler talk". As it is "water-cooler talk", we do not wish it to be officially a part of the union nor the corporation. If there is any concern about something said, as the facilitator of communications, I wish to just say I do not save communications. If a group member wishes to save something, that is up to them, as is the case with how we are doing email now.
I will also wish to add some type of disclaimer that no one will probably give it much thought, but it will state that statements made are the of the sole responsibility of the author of the statement and they are not the official opinion of the corporation nor the union and the maintainer of the list does not archive messages. I'm sure I'll come up with much better wording than that but I'm sure you get the gist.
I'm just hoping I've found the right product and can receive some advice from those that have set up lists.