Agent Inboxes

Categories / self-hosted

Self-hosted mail

This category lists 6 live-checked open-source MTAs and mail servers you run yourself for agent or app mail. Current entries include Haraka, Maddy, Mailcow, Postal, and 2 more. 6/6 passed the latest link check. Common tags in this set: open-source, imap, smtp, plugins, docker.

6 entries · data 2026-11-06T12:47:17Z

Haraka

High-performance Node.js SMTP server with a plugin architecture.

self-hostedself-hostedopen-sourcesmtpplugins
Open source live · 200 · 39ms

Maddy

Composable open-source mail server in Go. Lightweight self-host option for agent domains.

self-hostedself-hostedopen-sourcesmtpimap
Open source live · 200 · 319ms

Mailcow

Dockerized mailserver suite (SOGo, Rspamd, etc.) for self-hosted agent domains.

self-hostedself-hostedopen-sourcedockerimap
Open source live · 200 · 267ms

Postal

Open-source mail delivery platform with HTTP APIs and webhooks for sending at scale.

self-hostedself-hostedopen-sourcewebhookshttp-api
Open source live · 200 · 711ms

Stalwart

Modern all-in-one mail server (JMAP/IMAP/SMTP) you can self-host as agent infrastructure.

self-hostedself-hostedopen-sourcejmapimapsmtp
Open source live · 200 · 139ms

WildDuck

Scalable open-source email server focused on IMAP and modern APIs.

self-hostedself-hostedopen-sourceimapapi
Open source live · 200 · 227ms

← Full directory · Mailbox vs webhook