Deliver is a program for reliable and flexible local mail delivery. It's a perfect adjunct to your mail transport agent of choice (such as Sendmail or qmail). You can use it to kill spam, drop messages from specific senders, add a [LISTNAME] prefix to the subjects of messages that are delivered through mailing lists, and lots more.
qmail-ldap is an extension to stock qmail-1.03 to get all user account information from an LDAP database. Its primary target is POP toasters with thousands to millions of users, such as in ISP, FreeMail, and Corporate environments. It features full SMTP/POP3/IMAP server clustering for scaling and high availablity. Additionally there are state-of-the art spam filters, TLS SMTP encrytion, and mailbox quotas. A migration path for Netscape Messenger and Software.com's Post.Office installations is provided.
vpopmail (vchkpw) is a collection of programs and a library to automate the creation and maintenance of virtual domain email configurations for qmail installations using either a single UID/GID or any valid UID/GID in /etc/passwd with a home directory. Features are provided in the library for other applications which need to maintain virtual domain email accounts. It supports named or IP-based domains. It works with vqadmin, qmailadmin, vqregister, sqwebmail, and courier-imap. It supports MySQL, Sybase, Oracle, LDAP, and file-based (DJB constant database) authentication. It supports SMTP authentication combined with the qmail-smtp-auth patch. It supports user quotas and roaming users (SMTP relay after POP authentication).
ZMailer is an internet message transfer agent. It is intended for gateways or mail servers or other large site environments that have extreme demands on the abilities of the mailer. It was motivated by the problems of the Sendmail design in such situations. It is intended and designed as a multi-protocol mailer. The only protocol supported in this distribution is RFC822 (and variations).
valiases mimics the sendmail behavior of evaluating aliases for mail sent to one or more virtual mail addresses. It checks whether any of the (visibly) addressed mail accounts of an email message matches one of the configured aliases, and resends mail to the alias replacement. If you don't have access to /etc/aliases but you need it, this program is for you.
tMTA is a miniature Mail Transport Agent that vaguely emulates the command-line interface of Sendmail as used by many Unix programs such as mail(1). tMTA only supports local delivery to local users. It does not support SMTP or any form of inter-computer mail transport. It provides the barest functionality for daemons and users on a computer to communicate with each other using the common mail interface.
UMPL for XmailServer is a Web frontend for managing Xmailserver and Webmailsolution. Different frontends are presented for root, the postmasters of virtual domains, and end-users. It includes support for managing finger, POP3, SMTP, and Webmail in German, English, Dutch, Italian, and Spanish.
eximstate is a server/client project for monitoring a number of Exim installations. The clients are installed on each of the mailservers running exim and the server runs on the monitoring server. Each client reads the queue on the mail server and sends the total number of messages, the number of frozen message, and the number of bounce messages to the server. The server stores this data and uses RRDtool to make a graphical representations of the data.