Mail-List.com is described as 'Modern Listserv software hosted in the cloud, at affordable rates'. There are six alternatives to Mail-List.com, not only websites but also apps for a variety of platforms, including Self-Hosted solutions, Linux, Mac and BSD. The best alternative is Mailman, which is both free and Open Source. Other great sites and apps similar to Mail-List.com are Sympa (Free, Open Source), Dada Mail (Freemium), Gaggle Mail (Paid) and Discuss (Paid).
Sympa is an open source (GNU GPL) mailing list management (MLM) software. Its name is an acronym for Systeme de Multi-Postage Automatique (i.e. Automatic Mailing System), and also means "nice" in French.
Dada Mail is a contemporary mailing list manager, enabling you to easily run a verified mailing list that your subscribers can trust - right on your own website! Make running your business and personal mailing lists easy, fun, and inexpensive.