There are plenty of WP plugins for one-way correspondence... ie mailing lists where the owner can send out newsletters, etc. but i am looking to integrate the functionality of a listserv or email group for my WP users, where anyone in the group can address the whole group, but those outside the group cannot.
i could do this in google groups, but was hoping to integrate it w/ my club's WP site so that i could use it in conjunction with a membership plugin to keep track of who has paid the club dues and so forth.
edit to add: i think that MailPress or especially Email Users might work (Email Users if I adjust the capabilities) but ideally the group would be able to send messages from their emails to a single address (like with google groups) and not have to log in to send a message from the admin. there is no way i am going to be able to teach all of these people how to use WP, so i want the friction to be minimal. is this possible w/ WP?