Lyris ListManager by Lyris Technologies, Inc., offers outsourcing . Discussion or newsletter. Lyris.net supports virtual domains if you choose, meaning lists would be using your domain, not lyris.net. SmartBounce can handle your bounces on an outsourced basis. EASE by LSoft, makers of Listserv software.
Lists can be announcement or discussion, private or public, moderated or unmoderated.
They have a free option, or with commercial option you can use your own domain. ListHost.net can do discussion or announcement lists as well as mail merge. ListPlex by LSoft, makers of Listserv software. Allows you to outsource lists or mail merge under your own domain name. Lyris.net by Lyris Technologies, Inc., the makers of Lyris Email List Server .