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The Courier mail transfer agent (MTA) is an integrated mail/groupware server based on open commodity protocols such as ESMTP, IMAP, POP3, LDAP, SSL, and HTTP. Courier provides ESMTP, IMAP, POP3, Webmail, calendaring, and mailing list services.
Highly scalable/configurable Messaging Platform allowing users in a domain to be distributed on multiple hosts, has multiple queues. Provides virtual domains/users in MySQL. Modern MSP class qmail replacement with ESMTP, POP3/IMAP, QMTP, QMQP support
OneLDAP is a limited LDAP server that is a proxy to other common protocols, such as POP3 and IMAP. It provides basic SEARCH and BIND functions for standard LDAP authentication. It is based on the shell backend function of OpenLDAP. Release files are available at the project website.
slapd-cyrus is a slapd backend, used to translate LDAP DIT into Cyrus IMAP-server configuration. It can manage user folders, shared folders and ACLs of shared folders.
Deploy in 115+ regions with the modern database for every enterprise.
MongoDB Atlas gives you the freedom to build and run modern applications anywhere—across AWS, Azure, and Google Cloud. With global availability in over 115 regions, Atlas lets you deploy close to your users, meet compliance needs, and scale with confidence across any geography.
A suite of perl scripts used to build, maintain, and update a complete email server. Includes support for POP3(SSL), IMAP(SSL), SMTP, SMTP-AUTH, POP before SMTP, Webmail, Admin Interfaces, centralized configuration files, and automated mailbox cleanup.
Linux Monitor is system monitoring software for linux. Linux Monitor has client and server programs to monitor remote services(HTTP,SMTP,IMAP and NNTP). All "errors" are stored to database and viewed using cgi-scripts.
MailDB adds a database back-end to an IMAP server for features such as "virtual" mail folders (msgs appearing in multiple folders), "view" folders (dynamic results of searches), etc. The DB is inherently multi-user, allowing msg reference counting.
This is an email server in a box. Using ldap authentication for imap, pop3, smtp, and SSL/TLS versions of each. Includes web user-interface, web administration, web filters. Installs on top of RedHat in under 20 minutes by running one script.
MailRefinery is a tiny Linux distribution which will turn a machine into a complete mail server including Spam Assassin, GPL Virus filtering, POP, SPOP, IMAP, IMP, Fetchmail and a complete PHP based web interface to control it all.
The Email Administration Utility can help a client administrate their own Email accounts via a web interface using PHP and Perl scripting. The client can add, remove or modify accounts on a server that provides an IMAP port to connect to.
Swatcher is the service checking program. It checks any number of hosts, supports ping, http, ftp, dns, smtp, dbms and imap checks, supports mail, sms, beep and console notifications, is highly configurable and extendable.
A daemon that provides a method to track generic POP3 or IMAP logins and then email (in future:also block) the user if they exceed the number of accesses per given minutes allowed.
A daemon that monitors authentications via POP3 and IMAP, and allows hosts that have authentiated to relay mail via sendmail for a short period of time.
IMAPAssassin is a SpamAssassin enabled IMAP client that allows a user to filter any IMAP mailbox for spam from any computer connected to the Internet. You needn't have any access to the IMAP server and you don't need to run a mail server to filter mail
acmemail is a multiuser IMAP/POP3 to Web gateway (or webmail program). It reads mail from a mail server and displays it using HTML on a web server. It is written in Perl, has full support for MIME (and mod_perl) and is quite pretty.
Faces - a Gtk+ program for monitoring a list (typically mail
incoming messages) visually. It supports IMAP and POP mailboxes.
There is a huge collection of picons (personal icons) that can be
used in conjunction with the faces program.