Zentyal Zentyal is a native Microsoft Active Directory® implementation on Linux incorporating all the network services required in a small and medium business environment:... Free Open Source Linux No features added Add a feature 48 Like
Postfix Postfix is a mail transfer agent (MTA) that routes and delivers electronic mail. It attempts to be fast, easy to administer, and secure. The software is also known by... Free Open Source Mac OS X Linux No features added Add a feature 21 Like
Zimbra Collaboration Suite Zimbra Collaboration is an open, secure collaboration tool for email, calendaring, tasks and more. With the most innovative web application available today, Zimbra... Freemium Linux Web ActiveSync Real time collaboration Add a feature 27 Like
Exim Exim is a message transfer agent (MTA) developed at the University of Cambridge for use on Unix systems connected to the Internet. Free Open Source Mac OS X Windows Linux No features added Add a feature 12 Like
Courier-MTA 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... Free Open Source Mac OS X Linux BSD Self-Hosted No features added Add a feature 7 Like
sSMTP sSMTP is a simple MTA to deliver mail from a computer to a mail server. sSMTP is simple and lightweight, there are no daemons or anything hogging up CPU; Just sSMTP.... Free Open Source Linux No features added Add a feature 1 Like
Microsoft Exchange Server Microsoft Exchange Server is a messaging and collaborative software product developed by Microsoft. It is part of the Microsoft Servers line of server products and is... Commercial Windows Web Real time collaboration Add a feature 15 Like
Dragonfly Mail Agent A small Mail Transport Agent (MTA), designed for home and office use. Part of http://alternativeto . Free Open Source Linux BSD No features added Add a feature 3 Like
OpenSMTPD OpenSMTPD is a FREE implementation of the server-side SMTP protocol as defined by RFC 5321, with some additional standard extensions. It allows ordinary machines to... Free Open Source Linux BSD Self-Hosted No features added Add a feature 2 Like
Atmail Email Server Atmail webmail system offers a webmail client, email server platform and mailserver appliance for Linux, Unix and Windows. Features: Webmail Calendar Addressbook ... Commercial Linux Web File-sync Group Mail Add a feature 7 Like
iMail Fast, safe, heavy mail solution. Web-client access, LAN or WAN self-hosted server, maintenance-free design. No Windows server and database server required, unlimited... Free Windows Self-Hosted No features added Add a feature 2 Like
BulkMTA BulkMTA is Commercial Mail Server Similar to PowerMTA. IP Rotation, DKIM, Sender / Receiver Rate limiting Commercial Mac OS X Windows Linux No features added Add a feature 0 Like
msmtp In the default mode, it transmits a mail to an SMTP server (for example at a free mail provider) which takes care of further delivery. To use this program with your... Free Open Source Linux Xfce No features added Add a feature 1 Like
Microsoft SMTP Server Configure SMTP e-mail in IIS when you want to deliver e-mail messages from your site. Mail can be delivered immediately or it can be delivered to a file location on disk... Commercial Windows Email Forwarding Add a feature 1 Like
PowerMTA Email gateway application (SMTP server) that makes it easy for senders to adopt the latest authentication specifications ( SPF and DKIM) to comply with changing ISP... Commercial Windows Linux Self-Hosted No features added Add a feature 1 Like
