MailCrab Self-Hosted Email Test Server

Explore this developer service’s ongoing no-cost allowance, restrictions and official documentation before deploying.

INCLUDED FREE ALLOWANCEApache-2.0-licensed SMTP capture and email inspection server with Web UI, JSON API and WebSocket updates; no vendor-imposed software usage quota or expiry.

View official documentation

Plan details

What do these plan and deployment labels mean?

Plan: Ongoing free allowance
Deployment model: Self-hosted
Credit card: Not required
Commercial use: Allowed
Added to directory (UTC): 2026-11-04
Last checked: 2026-11-04

Important restrictions

Self-host via Docker, binary or Kubernetes and supply your own compute. Emails are stored in memory and lost on restart; default accept-all SMTP and permissive test authentication are unsuitable for public production mail delivery. Retention and high-volume WebSocket queue limits require configuration.

View official documentation

Independent community listing, not affiliated with the provider. Always check the latest billing policy and quotas before enabling paid usage.