Listserv

Yeah, I know it looks like it's missing an "e", but that's how it's spelled. A listserv, also known as a list server, is a small program that automatically sends messages to e-mail addresses on a mailing list. When someone subscribes to a mailing list, the listserv will automatically add the address and distribute future e-mail postings to that address along with all the others on the list. When someone unsubscribes, the listserv simply removes the address. A common listserv program is Majordomo, which instructs users to send an e-mail to majordomo@servername.com to subscribe or unsubscribe from a mailing list.