Alternatives to Sendmail for all platforms with any license

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

49 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 Linux
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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...

Commercial Linux Web
ActiveSync Real time collaboration Add a feature

28 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 Windows Linux
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12 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

16 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
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1 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 Linux BSD Self-Hosted
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7 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
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3 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
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3 Like
SophiMail

SophiMail is a fully-featured email and collaboration server solving the most critical email issues: maximizes Privacy, Portability and Cost efficiency, Admin & User...

Commercial BSD VirtualBox Self-Hosted VMware vSphere Hypervisor
Daily Backup Indexed search CalDAV CardDAV ... Data portability Privacy focused Private messaging Schedule Backup Security focused Selective folder sharing Shared folders Team Collaboration Two factor authentication Unlimited users 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
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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
BulkMTA

BulkMTA is Commercial Mail Server Similar to PowerMTA. IP Rotation, DKIM, Sender / Receiver Rate limiting

Commercial Mac 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
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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