# Mailu

> MIT full mailbox stack: SMTP/IMAP/webmail — not tx API

**Category:** Notifications  
**Pricing:** open-source  
**URL:** https://mailu.io  
**GitHub:** https://github.com/Mailu/Mailu  
**Added:** 2026-09-04

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## The Hook

Mailu is full email hosting you self-host when Postal is outbound delivery and Resend is transactional API.

## What's Good

MIT. SMTP + IMAP + webmail in one Docker-friendly stack. Real mailboxes for users, not just an HTTP send endpoint. Self-host is free.

## The Catch

Full mailbox SMTP/IMAP/webmail — not Resend/Plunk/Postal transactional-or-relay API. Ops-heavy: DNS, TLS, spam, storage. Distinct from Postal, Plunk, and Resend.

## Verdict

MIT mailbox suite. Free to run; ops-heavy vs a tx email API.