Sympa is a scalable and highly customizable mailing list software. It can cope with big lists (780,000 subscribers), and it comes with a complete Web interface for both the user and the administrator. It is internationalized. Sites can customize Web and mail templates, authentication backends, and authorization scenarios. Dynamic mailing lists can use multiple backends (LDAP, SQL, files, lists, or others). Sympa is the only S/MIME and DKIM enabled mailing list software, and it provides both authentication and encryption.
XMail is an Internet and intranet mail server featuring an ESMTP server, POP3 server, finger server, TLS support for SMTP and POP3 (both server and client side), multiple domains, no need for users to have a real system account, SMTP relay checking, DNS based maps check, custom (IP based and address based) spam protection, SMTP authentication (PLAIN LOGIN CRAM-MD5 POP3-before-SMTP and custom), a POP3 account synchronizer with external POP3 accounts, account aliases, domain aliases, custom mail processing, direct mail files delivery, custom mail filters, mailing lists, remote administration, custom mail exchangers, logging, and multi-platform code.
Ezmlm mailing list manager class is a PHP class to create and manage mailing lists with ezmlm. It features display of a table that shows lists already created, listing of local and domain parts as well as the number of current subscribers, creation and alteration of list properties, alteration of list automatic message texts, and support for list virtual hosts. It comes with a SOAP server interface to handle remote requests to subscribe and unsubscribe users, count subscribers, and verify if an address is already subscribed.
Shibboleth is a privacy and security-aware mailing list manager, perfect for allowing closed groups to interact on the Internet without interference from outsiders and former insiders. It features user verification to prevent any forged mailing to list, message digest handling, address standartization, header canonicalization, file serving, header-based passwords, PGP support, remote e-mail based management, lists moderation, message filters, and more.
newsPro is a Web interface for newsletters/announcements. Users can include their email address in the database, and they will receive email newsletters sent by this script. It is available in English, German, and Russian. In contrast to other similar scripts, no SQL is needed for newsPro.
Mailer is a program for managing email aliases in Unix. It allows users and administrators to easily create and manage email aliases. Mailer relieves administrators of the task from having to manually create aliases, and provides users with a powerful mechanism for setting up simple email lists and for redirecting their email without the use of .forward files.