This is a simple Docker containerized mail server that runs Dovecot, Postfix and Roundcube. Advanced security such as SMTP authentication or TLS is left unconfigured. One use case might be for developing software which requires emailing users. Simply build and run the container with your choice of APP_DOMAIN environment variable (which sets the recipient email domain) then follow the prompts. To send an email use the full domain such as [email protected]. Finally, configure your app (in development mode) with an SMTP domain set to http://localhost/roundcubemail or host.docker.internal.

Examples

Build

docker build -t fedora:mail .

Run

docker run --name mailserver -e APP_DOMAIN=chemlab.edu --rm -it -p 80:80 -p 25:25 -p 143:143 -p 110:110 fedora:mail

Thanks to

https://github.com/Codegyre/DockerPostfixDovecot/blob/master/Dockerfile

Alternatives

https://mailcatcher.me

• Production-ready email server
  https://github.com/docker-mailserver/docker-mailserver