POP3 Server with Webhook

Simple POP3 server that gets its messages via a webhook. Single account/mailbox only.

Can be used to connect mail-based applications to a server such as postal.

Features

• Storage of mail in the filesystem (or in-memory)
• POP3 compliant
• simple user authentication (user+password, single user)
• webhook to receive mail
• simple authentication for the webhook (token)

Usage

Running

I recommend using the docker image: ghcr.io/linkyard/pop3-webhook-server:latest or eu.gcr.io/linkyard-191615/linkyard-cloud/pop3-webhook-server (private)

Run by calling the executable with the following parameters (env or command line)

• user: Username that can be used to connect via POP3. Default: mail
• password: Password that is used to connect via POP3 (required)
• token: Token that is required to submit via webhook (required)")
• http-interface: The address to listen on for HTTP requests. Default: localhost:8080
• base-path: The base HTTP path the webhook should run under. Default: /
• pop-interface: Interface (host:port) to listen on. Default: localhost:1100
• mail-dir: Directory to store the mail in. Required unless in-memory-only is set
• in-memory-only: Set to true to not persist the messages to disk. Default: false
• log-level: Log level (ERROR, WARN, INFO, DEBUG, TRACE). Default: INFO

Storing Mail

Store the mail by calling the webhook (default is http://localhost:8080/store).

Query Paramters:

• token: set to the same value as the startup parameter (used for authentication)

Body - application/json with the following fields:

• id (number): ID of the message
• message (string, base64 encoded): The raw content of the message

Receiving Mails

Connect to the POP3 server at localhost:1100 (or what you specified in pop-interface). Use basic authentication with the user/password you specified at startup.

Credits

• Uses https://github.com/DevelHell/popgun/ for POP3

LICENSE

MIT, see License