Email Servers (SMTP/IMAP)
10 self-hosted open source alternatives in this category
10 services found
Postal
A self-hosted mail delivery platform for applications
16.2k
1.2k
Last commit: 3mo ago
Open-source SMTP delivery platform with web UI, HTTP API, and message tracking for sending transactional email from your own infrastructure.
Alternative to:
Twilio SendGrid+5
Mail-in-a-Box
A mail server in a box with a modern admin panel.
15.1k
1.5k
Last commit: 6d ago
Turn a fresh Ubuntu server into a complete mail server with webmail, DNS, spam filtering, automatic TLS, and an easy-to-use admin control panel.
Alternative to:
Google Workspace+7
Mailcow
Dockerized mail server suite with a modern admin UI
11.9k
1.6k
Last commit: 1mo ago
All-in-one, Docker-based email server stack with SMTP/IMAP, anti-spam, web UI administration, DKIM, and automated TLS via ACME.
Alternative to:
Gmail+3
Stalwart Mail Server
All-in-one secure mail server with modern spam filtering
11.1k
600
Last commit: 4d ago
Stalwart is an all-in-one mail server (SMTP/IMAP/JMAP) with built-in anti-spam/DMARC, web admin UI, and flexible routing for running your own email infrastructure.
Alternative to:
Microsoft Exchange Online+9
Mailu
Docker-based mail server stack with a modern admin UI
7k
957
Last commit: 25d ago
Mailu is an all-in-one email server stack (SMTP/IMAP/webmail) packaged for Docker, with anti-spam/AV, DKIM/DMARC support, and a web admin interface for domains and mailboxes.
Alternative to:Gmail+6
SimpleLogin
Email aliasing to protect your real inbox
6.3k
551
Last commit: 2d ago
Self-hostable email alias manager that generates aliases, forwards mail, and shields your real address with reply support, custom domains, and anti-tracking options.
Alternative to:
Fastmail Masked Email+3
Mox
Modern all-in-one email server with a built-in admin web UI
5.3k
176
Last commit: 20d ago
All-in-one SMTP/IMAP mail server with web admin, spam filtering, DKIM/DMARC, and automatic TLS via ACME—designed for simpler, safer email hosting.
Alternative to:Google Workspace+4
AnonAddy
Open-source email aliases and forwarding for privacy.
4.3k
243
Last commit: 4d ago
Create unlimited email aliases and forward mail to your inbox to reduce spam, protect identity, and control who can reach you.
Alternative to:
Apple Hide My Email (iCloud+)+5
YunoHost
A server OS to self-host apps easily on your own domain
2.8k
329
Last commit: 1d ago
Debian-based server distribution with a web admin, app catalog, SSO and automated TLS/DNS/email setup for easy, maintainable self-hosting.
Alternative to:
cPanel+5
Dovecot
High-performance IMAP and POP3 server for Linux/Unix
1.2k
322
Last commit: 2d ago
Dovecot is an IMAP/POP3 mail server focused on performance, security, and standards compliance, commonly used for mailbox access in Postfix/Exim-based email stacks.
Alternative to:Microsoft Exchange Online+4