Dockerized http://mailcatcher.me/ forked by https://github.com/schickling/dockerfiles/tree/master/mailcatcher
Extra small mailcatcher image
$ docker run -d -p 1080:1080 --name mailcatcher quay.io/junxy/docker-mailcatcher:latest
Link the container to another container and use the mailcatcher SMTP port 1025
via a ENV variable like $MAILCATCHER_PORT_1025_TCP_ADDR
.