Courier-MTA Alternatives

Courier-MTA is described as '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, and mailing list services within a single, consistent, framework' and is a Mail Server in the office & productivity category. There are more than 10 alternatives to Courier-MTA for a variety of platforms, including Linux, Mac, Windows, BSD and Self-Hosted apps. The best Courier-MTA alternative is Mail-in-a-box, which is both free and Open Source. Other great apps like Courier-MTA are Postfix, OpenSMTPD, Exim and Sendmail.

Courier-MTA alternatives page was last updated

Courier-MTA

Free • Open Source
Mail Server

The Courier mail transfer agent (MTA) is an integrated mail/groupware server based on open commodity protocols, such as...

More about Courier-MTA

Mail-in-a-box
Is this is a good alternative?
Yes
No
Free • Open Source
Mail Server
Self-Hosted
Roundcube
13 Mail-in-a-box alternatives
Easy-to-deploy mail server.
- - Mail-in-a-box is the most popular Self-Hosted alternative to Courier-MTA.
- - Mail-in-a-box is the most popular Open Source & free alternative to Courier-MTA.
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Mail-in-a-box Features
IMAP Support
Nextcloud integration
Postfix
Is this is a good alternative?
Yes
No
Free • Open Source
Mail Server
Mac
Linux
24 Postfix alternatives
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 its former names VMailer and IBM Secure Mailer.
- - Postfix is the most popular Mac & Linux alternative to Courier-MTA.
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OpenSMTPD
Is this is a good alternative?
Yes
No
Free • Open Source
Linux
BSD
Self-Hosted
12 OpenSMTPD alternatives
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 exchange e-mails with other systems speaking the SMTP protocol.
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OpenSMTPD Features
SMTP Support
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Exim
Is this is a good alternative?
Yes
No
Free • Open Source
Mail Server
Mac
Linux
16 Exim alternatives
Exim is a message transfer agent (MTA) developed at the University of Cambridge for use on Unix systems connected to the Internet.
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Exim Features
SMTP Support
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Sendmail
Is this is a good alternative?
Yes
No
Free • Open Source
Mail Server
Mac
Linux
26 Sendmail alternatives
Sendmail is a general purpose internetwork email routing facility that supports many kinds of transfer and delivery methods, including the Simple Mail Transfer Protocol (SMTP) used for email transport over the Internet.
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Sendmail Features
SMTP Support
sSMTP
Is this is a good alternative?
Yes
No
Free • Open Source
Linux
19 sSMTP alternatives
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. Unlike Exim4, sSMTP does not receive mail, expand aliases, or manage a queue.
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sSMTP Features
Support for NodeJS
SMTP Support
Discontinued
The last update was in 2013.
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Dragonfly Mail Agent
Is this is a good alternative?
Yes
No
Free • Open Source
Linux
BSD
7 Dragonfly Mail Agent alternatives
A small Mail Transport Agent (MTA), designed for home and office use. Part of DragonFly BSD , it accepts mails from locally installed Mail User Agents (MUA) and delivers the mails either locally or to a remote destination.
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Dragonfly Mail Agent Features
SMTP Support
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Microsoft SMTP Server
Is this is a good alternative?
Yes
No
Paid • Proprietary
Windows
13 Microsoft SMTP Server alternatives
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 where it can be retrieved for delivery later.
- - Microsoft SMTP Server is the most popular Windows alternative to Courier-MTA.
- - Microsoft SMTP Server is the most popular commercial alternative to Courier-MTA.
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Microsoft SMTP Server Features
Exchange
Email Forwarding
SMTP Support
Hectane
Is this is a good alternative?
Yes
No
Free • Proprietary
Windows
Linux
6 Hectane alternatives
An SMTP client that is extremely easy to configure and use, providing a simple HTTP API that is used for sending emails.
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Hectane Features
SMTP Support
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NikaMail
Is this is a good alternative?
Yes
No
Free • Open Source
Mail Server
Mac
Linux
13 NikaMail alternatives
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 transfer agent (port 587) and mail exchange service (port 25). NikaMail supports TLS.
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NikaMail Features
POP3 Support
Exchange email
EmailSuccess
Is this is a good alternative?
Yes
No
Paid • Proprietary
Mail Server
Linux
Java
20 EmailSuccess alternatives
EmailSuccess, an advanced SMTP Server (MTA) built from the ground up to handle the most critical reliability, performance, security, and deliverability requirements.
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EmailSuccess Features
Email deliverability
On-premises software
Management Console
Encrypted Email
SMTP Support