Top 12 Open-Source Alternatives to CMail

Product categories

Email Email Clients Email Delivery Email Management Email Marketing Email Marketing Platforms Email Service Provider Enterprise Communication MTA Open Source SMTP Server Self-hosted Email

Summary

The top open-source alternatives to CMail are sendEmail, Mailer, and Hectane. One of the criteria for ordering this list is the number of mentions that products have on reliable external sources. You can suggest additional sources through the form here.

sendEmail Landing Page
1

sendEmail

sendEmail is a lightweight, command line SMTP email client.
Pricing:
- Open Source
#SMTP Server #Email #MTA
Mailer Landing Page
2

Mailer

Free utility to send emails from the command line. No Installation. All contained in one file.
Pricing:
- Open Source
#Email Marketing #Email Marketing Platforms #Email
Hectane Landing Page
3

Hectane

Lightweight, cross-platform SMTP client
Pricing:
- Open Source
#SMTP Server #Email #MTA
kumomta.com
4

KumoMTA

KumoMTA is the world's first Open-Source MTA designed from the ground-up for large-volume senders. Get a fast, flexible, supported solution.
Pricing:
- Open Source
- Free
- Free Trial
#Email #Self-hosted Email #SMTP Server 1 social mentions
Mail-in-a-box Landing Page
5

Mail-in-a-box

Mail-in-a-Box provides webmail and an IMAP/SMTP server for use with mobile devices and desktop mail software and also includes contacts and calendar synchronization.
Pricing:
- Open Source
#Email #Self-hosted Email #Email Service Provider 115 social mentions
Exim Landing Page
6

Exim

Exim is a message transfer agent (MTA) developed at the University of Cambridge for use on Unix systems connected to the Internet.
Pricing:
- Open Source
#SMTP Server #Email #MTA
Haraka Landing Page
7

Haraka

Open source SMTP server written in Node.js
Pricing:
- Open Source
#Email #SMTP Server #Self-hosted Email 9 social mentions
mailcow Landing Page
8

mailcow

An open source mailserver suite.
Pricing:
- Open Source
#Email #Self-hosted Email #Email Service Provider 82 social mentions
Courier-MTA Landing Page
9

Courier-MTA

The Courier mail transfer agent (MTA) is an integrated mail/groupware server based on open...
Pricing:
- Open Source
#SMTP Server #MTA #Email
iRedMail Landing Page
10

iRedMail

A fully fledged, free email server solution, an open source project (GPL v2).
Pricing:
- Open Source
#Email #SMTP Server #Self-hosted Email 2 social mentions
Rainloop Landing Page
11

Rainloop

RainLoop is a web based email client.
Pricing:
- Open Source
#Email #Email Clients #Email Management
OpenSMTPD Landing Page
12

OpenSMTPD

OpenSMTPD is a FREE implementation of the server-side SMTP protocol as defined by RFC 5321, with...
Pricing:
- Open Source
#SMTP Server #Email #MTA 2 social mentions