Posthorn Self-Hosted Email Gateway

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

INCLUDED FREE ALLOWANCEApache-2.0 licensed self-hosted outbound email gateway with HTTP form, HTTP API and SMTP ingress and configurable outbound transports; no software subscription or vendor-imposed gateway quota.

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

Does not provide free email delivery or sending credits. Requires a separately configured transactional email provider or SMTP relay, which may charge fees or enforce quotas, plus your own Docker/server resources. Delivery limits and commercial terms of the upstream provider are separate.

View official documentation

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