atech/postal
Postal
Postal is an open-source email infrastructure and self-hosted delivery platform. It functions as an SMTP mail server and inbound email gateway, providing the tools necessary to send and receive email through a privately managed infrastructure.
The system manages SMTP infrastructure for outgoing message delivery and provides capabilities for custom email receiving. It allows for the routing of incoming external emails to internal applications or websites for automated processing.
The platform includes support for multi-tenant domain mapping, event-driven webhook notifications, and plugin-based message filtering. It also incorporates queue-based delivery retries and DNS-based recipient validation to manage mail flow and server reputations.
Features
- Email Servers - Provides a full-featured, self-hosted mail server for sending and receiving email.
- Email Servers - Provides the infrastructure to receive incoming mail and route it to internal applications for processing.
- Email Hosting Platforms - Offers a full-featured, self-hosted platform for managing email domains and delivering messages.
- Email Systems - Functions as an inbound gateway that accepts emails and routes them to external applications for processing.
- Inbound Routing - Receives external emails and routes them to internal applications or websites for automated processing.
- Email Delivery Services - Provides a privately managed platform for sending outgoing emails from web applications and servers.
- Mail Servers - Implements a complete SMTP mail server for outgoing message delivery and routing.
- SMTP Routing - Acts as a Mail Transfer Agent to relay and route incoming and outgoing mail between servers.
- SMTP Server Implementations - Provides the framework for hosting and maintaining a dedicated SMTP server for transactional and system emails.
- Delivery Retries - Stores outgoing messages in a persistent queue and attempts redelivery using exponential backoff for failed attempts.
- Mailbox Routing - Enables the setup of dedicated mailboxes and routing rules to capture incoming communications for specific domains.
- Server-Side Message Filtering - Provides programmable filters for incoming mail to block spam or route messages to specific endpoints.
- Domain Mapping - Isolates mail configurations and routing rules by associating specific email domains with separate virtual accounts.
- Webhook Event Notifications - Triggers HTTP POST requests to external services whenever mail events such as delivery or bounces occur.
- Email Infrastructure - Full-featured open-source platform for incoming and outgoing mail.
- Email - Host a full-featured mail delivery platform.
