A fully featured open source mail delivery platform for incoming and outgoing email, designed as a self-hosted alternative to SendGrid and Mailgun.
Postal is an open-source mail delivery platform that provides both incoming and outgoing email capabilities for websites and web servers. It solves the problem of relying on proprietary email services by offering a self-hosted alternative with enterprise features like email tracking, webhooks, and bounce management.
Developers and organizations who need reliable email delivery infrastructure but want to maintain control over their email stack rather than depending on third-party cloud services.
Postal offers the full feature set of commercial email services like SendGrid and Mailgun, but with the flexibility and control of self-hosting, eliminating vendor lock-in and providing complete data ownership.
📮 A fully featured open source mail delivery platform for incoming & outgoing e-mail
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Handles both incoming and outgoing emails with full SMTP support, as stated in the README, eliminating the need for separate services for receiving and sending.
Provides full ownership over email infrastructure and data, aligning with its philosophy of avoiding vendor lock-in by deploying on your own servers.
Includes advanced capabilities like email tracking, bounce management, and webhook APIs, matching commercial platforms like SendGrid and Mailgun.
Supports managing multiple domains from a single installation, simplifying email operations for organizations with diverse branding needs.
Requires deploying and configuring on personal servers, including DNS and security settings, which can be time-consuming and technically demanding compared to cloud services.
Users are responsible for updates, security patches, and deliverability optimization, adding operational overhead that managed services handle automatically.
As a self-hosted solution, it lacks the extensive ecosystem of connectors that cloud providers offer, often necessitating custom development for third-party integrations.
Postal is an open-source alternative to the following products:
Mailgun is a cloud-based email service and API for sending, receiving, and tracking transactional and marketing emails for applications.
Postmark is a transactional email delivery service designed for developers, providing reliable email sending with detailed analytics and deliverability tools.
SendGrid is a cloud-based email delivery platform that provides transactional and marketing email services with APIs for developers.