Self-Hosted Mail Transfer Agents: 33 Open-Source Apps
Best for your setup
Homelab Novice
Wants it running tonight, with one command.
docker-mailserver19.7k
A production-ready containerized mail server with SMTP, IMAP, LDAP, anti-spam, and anti-virus services.
- Live demo
- Documented
See all76/100 fitHow well this app matches homelab novices, 0 to 100
Homelab Expert
Runs a stack already and wants it to plug in.
Stalwart Mail Server15.3k
Stalwart is an open-source mail and collaboration server with support for IMAP, JMAP, SMTP, CalDAV, CardDAV, and WebDAV.
- Several SSO sign-in methods
- REST or GraphQL API
See all86/100 fitHow well this app matches homelab experts, 0 to 100
Homelab Hacker
Wants control: APIs, scripts and many ways to run it.
OpenTrashmail967
Open Trashmail is a self-hosted trashmail service for receiving emails through a web UI, JSON API, RSS feeds, and custom webhooks.
- Scriptable API
- Works offline
See allDefault rank #20
79/100 fitHow well this app matches homelab hackers, 0 to 100
33 projects
Mailu
7.6k
Mailu is a full-featured mail server provided as a set of Docker images.
Email SolutionsPermissive LicenseMail Transfer Agents+3
10 ContainersFully FOSS
Mailcow
13.7k
mailcow is a dockerized mail server suite for self-hosted email management.
Email SolutionsCopyleft LicenseMail Transfer Agents+3
18 Containers
docker-mailserver
19.7k
A production-ready containerized mail server with SMTP, IMAP, LDAP, anti-spam, and anti-virus services.
Email SolutionsPermissive LicenseMail Transfer Agents+2
Stalwart Mail Server
15.3k
Stalwart is an open-source mail and collaboration server with support for IMAP, JMAP, SMTP, CalDAV, CardDAV, and WebDAV.
Email SolutionsMail Transfer AgentsCalendar and Contacts+2
Haraka
5.6k
Haraka is a modular Node.js SMTP server for high-throughput mail transfer and filtering.
Mail Transfer AgentsPermissive LicenseEmail Solutions+1
Mail-in-a-Box
15.4k
A one-click, easy-to-deploy mail server appliance for self-hosting email on Ubuntu.
Email SolutionsWebmail ClientsMail Transfer Agents+5
Postal
16.9k
Postal is a complete, self-hosted mail server for websites and web servers.
Email SolutionsPermissive LicenseMail Transfer Agents+2
Mox
5.9k
Mox is an open source self-hosted email server with SMTP, IMAP, webmail, and a web admin interface.
Email SolutionsMail Transfer AgentsMail Delivery Agents+3
Maddy Mail Server
6.1k
A composable all-in-one mail server that handles SMTP sending and receiving, IMAP storage, and related email security protocols.
Email SolutionsMail Transfer AgentsMail Delivery Agents+2
wildduck
2.1k
A scalable no-SPOF IMAP/POP3 mail server that stores data in a distributed MongoDB backend.
Email SolutionsMail Transfer AgentsSelf Hosting Solutions+2
3 Containers
Modoboa
3.5k
Modoboa is a mail hosting and management platform with a web user interface, administration panel, and webmail.
Email SolutionsPermissive LicenseSelf Hosting Solutions+4
BillionMail
16.0k
BillionMail is an open-source mail server and email marketing platform for sending newsletters, promotional emails, and transactional messages.
Mailing ListsEmail SolutionsMail Transfer Agents+2
AnonAddy
4.9k
Self-hostable anonymous email forwarding service for creating aliases and forwarding mail to your real inbox.
Email SolutionsPermissive LicenseMail Transfer Agents+1
Cyrus IMAP
652
An IMAP server for mail access, with support for email, contacts, calendar, and related messaging protocols.
Mail Delivery AgentsEmail SolutionsMail Transfer Agents+2
iRedMail
1.8k
iRedMail is a full-featured mail server solution for deploying self-hosted email services.
Email SolutionsCopyleft LicenseMail Transfer Agents+2
OpenSMTPD
586
OpenSMTPD is a free server-side SMTP implementation for exchanging email between Unix-like machines and other SMTP systems.
Mail Transfer AgentsSelf Hosting SolutionsPermissive License
Dovecot
1.3k
Dovecot is a mail server software project with configuration and RFC implementation documentation.
Mail Delivery AgentsMail Transfer AgentsSelf Hosting Solutions+2
emailwiz
2.2k
A setup script for installing and configuring a self-hosted email server on Debian or Ubuntu.
Email SolutionsMail Transfer AgentsMail Delivery Agents+3
Sympa
315
Sympa is an electronic mailing list manager that automates subscription, moderation, archive management, and message delivery for mailing lists.
Mailing ListsSelf Hosting SolutionsMail Transfer Agents+2
OpenTrashmail
967
Open Trashmail is a self-hosted trashmail service for receiving emails through a web UI, JSON API, RSS feeds, and custom webhooks.
Mail Transfer AgentsEmail SolutionsSelf Hosting Solutions+2
DragonFly
266
dma is a small Mail Transport Agent for local mail submission and delivery to local or remote destinations.
Mail Transfer AgentsMail Delivery AgentsNetwork Utilities+2
Simple NixOS Mailserver
320
Complete mailserver solution leveraging the Nix Ecosystem.
Email SolutionsCopyleft LicenseMail Transfer Agents+2
chasquid
SMTP (email) server with a focus on simplicity, security, and ease of operation.
Mail Transfer AgentsSelf Hosting SolutionsPermissive License
Courier MTA
Fast, scalable, enterprise mail/groupware server providing ESMTP, IMAP, POP3, webmail, mailing list, basic web-based calendaring and scheduling services.
Mail Transfer AgentsCopyleft LicenseEmail Solutions+4
Dovel
SMTP server that sends and receives emails according to a simple configuration file, with an optional web interface that you can use to browse your emails.
Email SolutionsCopyleft LicenseMail Transfer Agents+2
EmailRelay
A small and easy to configure SMTP and POP3 server for Windows and Linux.
Mail Transfer AgentsMail Delivery AgentsNetwork Utilities+2
Exim
Message transfer agent (MTA) developed at the University of Cambridge.
Mail Transfer AgentsSelf Hosting SolutionsNetwork Utilities+2
Fully FOSS
Postfix
Fast, easy to administer, and secure Sendmail replacement.
Mail Transfer AgentsSelf Hosting SolutionsNetwork Utilities
mlmmj
27
Mailing list management made joyful.
Mail Transfer AgentsSelf Hosting SolutionsFully FOSS+1
Fully FOSS
Forward Email
1.7k
Forward Email is a privacy-focused email service and open-source email platform with local development and server deployment tooling.
Email SolutionsCopyleft LicenseMail Transfer Agents+1
Source Available
Axigen
Turnkey messaging solution for small & micro businesses, integration projects or test environments.
Self Hosting SolutionsEmail SolutionsMail Transfer Agents+2
Poste.io
Full-featured solution for your Email server. Native implementation of last anti-SPAM methods, webmail and easy administration included. Free tier available.
Self Hosting SolutionsEmail SolutionsWebmail Clients+1
Sendmail
Message transfer agent (MTA).
Mail Transfer AgentsSelf Hosting SolutionsNetwork Utilities