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

Mailtrap

Mailtrap is a fake SMTP server for development teams to test, view and share emails sent from the development and staging environments without spamming real customers.

Freemium Web

FakeSMTP

FakeSMTP is a Free Fake SMTP Server with GUI for testing emails in applications easily. It is written in Java. Configure your application to use "localhost"...

Free Open Source Mac Windows Linux

Debug Mail

Debug Mail is a mail server for testing applications and websites without need to set up an SMTP server.

Free Web

LunaticSMTP

LunaticSMTP is a dummy SMTP server with desktop GUI for testing email sending applications.

Free Open Source Mac Windows Linux BSD JavaFX ... Java

Mailosaur

Email Testing for QA & Development Teams. Catch every email your product sends, analyze it's contents, follow links and test deliverability all via the Mailosaur...

Commercial $ $ $ Web

MailCatcher

MailCatcher runs a super simple SMTP server which catches any message sent to it to display in a web interface. Run mailcatcher, set your favourite app to deliver to...

Free Open Source Mac Windows Linux

DummySMTP

Simplify testing the email functionality of your application with a free DummySMTP inbox.

Free Software as a Service (SaaS)

Mailocal

A local SMTP server with email display, used mostly for development of other apps. Think unlimited Mailtrap that runs on your own computer.

Free Open Source Self-Hosted

MailSpons

Fake SMTP server for safe email testing. Stop accidentally spamming your customers.

Free Web Software as a Service (SaaS)

testmail.app

QA tool for automating end-to-end email tests. Get unlimited private email addresses and inboxes for testing new user signups, transactional emails and drip campaigns...

Freemium $ $ $ Software as a Service (SaaS)

Go-Guerrilla

A lightweight SMTP server written in Go, made for receiving large volumes of mail. To be used as a package in your Go project, or as a stand-alone daemon by running the...

Free Open Source Web

Lettre

Lettre provides the following features: Multiple transport methods Unicode support (for email content and addresses) Secure delivery with SMTP using encryption and...

Free Open Source Mac Windows Linux

SMTP Bucket

A fake SMTP server for e-mail integration testing. We capture all the e-mails we receive and make them available via our website and REST API.

Free Web

Inbucket

Inbucket is an email testing application; it will accept messages for any email address and make them available to view via a web interface.

• Inbucket has all the major functionalities that MailHog has, but it's still being maintained. Guest • Aug 2019 Disagree   Agree

Free Open Source Mac Windows Linux