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
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
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
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
Sendmail Sendmail is a general purpose internetwork email routing facility that supports many kinds of transfer and delivery methods, including the Simple Mail Transfer Protocol... Free Open Source Mac OS X Linux No features added Add a feature 3 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
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
MailerQ MailerQ is a high performance Mail Transfer Agent (MTA) and a very fast SMTP server, designed to deliver large volumes of email messages at very high speeds. MailerQ is... Commercial Linux Management Console Add a feature 3 Like
Hectane An SMTP client that is extremely easy to configure and use, providing a simple HTTP API that is used for sending emails. Free Windows Linux No features added Add a feature 2 Like
Haraka Haraka is an open source SMTP server written in Node.js which provides extremely high performance coupled with a flexible plugin system allowing Javascript programmers... Free Open Source Self-Hosted Node.JS No features added Add a feature 3 Like
NikaMail NikaMail is a portable, extendable, zero-config email server. It is designed to perform automation tasks, provide access to mailboxes (port 110), serve as a mail... Free Open Source Mac Linux Exchange email POP3 Support Add a feature 1 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
EmailSuccess EmailSuccess, an advanced SMTP Server (MTA) built from the ground up to handle the most critical reliability, performance, security, and deliverability requirements. Commercial Linux Email deliverability Encrypted email Add a feature 0 Like
