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Developer ToolsAlternative to SendGridAlternative to MailgunAlternative to Postmark

Postal

A fully featured open-source mail delivery platform for incoming & outgoing emails.

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LicenseGPL-3.0
GitHub stars15.5k
Last commit1 weeks ago
Tags6 topics
Smtp RelayCommunicationWebhook MailSendgrid AlternativeRubyTransactional Email
Overview

Why consider Postal?

Postal is a complete open-source mail delivery platform built in Ruby. Designed as a self-hosted alternative to SendGrid and Mailgun, it handles transactional outgoing email delivery, inbound webhooks, and live delivery logs.

Guided learning

Learn Postal by building

Practical setup notes, real use cases, and copy-ready examples in one focused guide.

1 min read 2 sections
In this guide2 sections

Overview of Postal

Postal provides HTTP APIs and SMTP relays for sending transactional application emails with click tracking and bounce handling.

Running with Docker

bash
1docker run -d \
2 --name postal \
3 -p 25:25 -p 5000:5000 \
4 postalserver/postal:latest

Postal is licensed under the GNU General Public License v3.0 (GPL-3.0).

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Postal FAQs

Postal is listed as a Developer Tools tool on TiloBox. Review the overview, features, and official documentation on this page to decide whether it solves your specific workflow.

Start with the project's GitHub repository and official website for supported installation and deployment instructions. Test the setup with representative data or a small project before rolling it out more widely.

Postal is listed under the GPL-3.0 license. Read the complete license text and the project's notices before using, modifying, or distributing the software.

Production readiness depends on your requirements. Review maintenance activity, security practices, documentation, backup and upgrade procedures, and compatibility with your stack; then validate it in a non-production environment.

Postal is listed as an alternative to SendGrid. Compare the core workflow, deployment model, integrations, and licensing against your must-have requirements before switching.