Dockerized IMAP server

IMAP server for debugging.

Now built on Ubuntu 22.04, and on Docker Hub with linux/arm64 and linux/amd64 versions

docker buildx build --no-cache --platform linux/arm64,linux/amd64 --tag tabascoterrier/docker-imap-devel --push .

IMPORTANT: This image is ONLY for developing/debugging proposes

This docker image is based on https://github.com/tomav/docker-mailserver If you look for a docker image for production environment, then go here: https://hub.docker.com/r/tvial/docker-mailserver/

This image is even simpler than tvial docker image. Includes only Postfix (SMTP) and Dovecot (IMAP) servers with one catchall mailbox debug@example.org for all emails. So, it's very useful for debugging. Optionally, you can define another normal mailbox.

Every email received via SMTP will be delivered locally to debug@example.org, so it's safe for testing a web application sending emails with a production list of emails.

Using your favorite email client you can connect via IMAP protocol to see emails like original recipient would received them

Run container with docker compose

cp docker-compose.yml.dist docker-compose.yml

Edit docker-compose.yml for set these environment variables:

• MAILNAME: Mail domain (by default, localdomain.test)
• MAIL_ADDRESS: Normal user mailbox email address (optional)
• MAIL_PASS: Normal user mailbox password

docker-compose up

Configure your email client with these parameters and test it sending any email to any email address

Catch all debug mailbox

• IMAP server: imap

• IMAP encryption: SSL

• IMAP port: 993

• IMAP username: debug@example.org (change example.org by your MAILNAME)

• IMAP password: debug

• SMTP server: imap

• SMTP encryption: No

• SMTP port: 25

• SMTP authentication: none

Normal user mailbox (Optional)

• IMAP server: imap

• IMAP encryption: SSL

• IMAP port: 993

• IMAP username: address@example.org (change address@example.org by your MAIL_ADDRESS)

• IMAP password: pass (change pass by your MAIL_PASS)

• SMTP server: imap

• SMTP encryption: No

• SMTP port: 25

• SMTP authentication: none