Qmail alternatives and similar software solutions

Based on the "Mail Transfer Agents" category.
Alternatively, view Qmail alternatives based on common mentions on social networks and blogs.

MailHog

9.1 0.0 Qmail VS MailHog

Web and API based SMTP testing
Postal

9.1 9.6 Qmail VS Postal

📮 A fully featured open source mail delivery platform for incoming & outgoing e-mail

WorkOS - The modern identity platform for B2B SaaS

The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.

Promo workos.com

MailCatcher

8.2 6.1 L5 Qmail VS MailCatcher

Catches mail and serves it through a dream.
Haraka

8.0 7.5 L3 Qmail VS Haraka

A fast, highly extensible, and event driven SMTP server
Maildrop

5.5 0.0 Qmail VS Maildrop

Disposable email SMTP server, also useful for development.
Exim

5.2 9.2 L1 Qmail VS Exim

Exim Mail Transport Agent - source, testsuite and documentation
OpenSMTPD

4.5 9.1 L2 Qmail VS OpenSMTPD

This is official OpenSMTPD Portable repository. Forks, pull requests and other contributions are welcome!
Slimta

3.0 2.8 L5 Qmail VS Slimta

Python libraries to send, receive, and queue email.
Courier MTA

1.9 7.1 L1 Qmail VS Courier MTA

Courier Mail Server
Lightmeter

1.0 0.0 Qmail VS Lightmeter

Lightmeter uses GitLab, not GitHub -- find repos at: https://gitlab.com/lightmeter
Sendmail

- Qmail VS Sendmail

Message transfer agent
chasquid

- Qmail VS chasquid

SMTP
Postfix

- Qmail VS Postfix

Fast, easy to administer, and secure Sendmail replacement.

* Code Quality Rankings and insights are calculated and provided by Lumnify.
They vary from L1 to L5 with "L5" being the highest.

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README

qmail-outgoingips

With this patch qmail-remote is modified to bind to different local ip addresses depending on the domain part in the sender argument. The mapping between ip addresses and domains is specified in a new control file: control/outgoingips. The HELO string will be set to the domain part if there is a match.

Based on outgoingip.patch. Let me know if you find it useful.

This software is in the public domain.