Setup Mailcrab in Docker & PHP

Okay – it took me a while to get this configured correctly so I thought I’d share the setup with all of you. In the end, my issue was not setting -t -i in my sendmail path.

Mailcrab Docker Compose setup

  mailcrab:
    container_name: mailcrab
    image: marlonb/mailcrab:latest
    ports:
      - '1080:1080'
      - '1025:1025'

Now, I run this in combination with a few PHP/WordPress containers, make sure that you set the PHP sendmail path correctly in your php.ini file, like below:

sendmail_path = /usr/sbin/sendmail -t -i -S mailcrab:1025

And you should be all set!

Sample docker-compose file for PHP container

  php:
    container_name: ${SITENAME:-wordpress}-php
    build:
      context: .
      dockerfile: docker/php/Dockerfile
      args:
        - UID=${UID:-1000}
        - GID=${GID:-1000}
    volumes:
      - ./data:/var/www/html
      - ./logs/php.log:/var/log/fpm-php.www.log
      - ./docker/php/default.conf:/usr/local/etc/php/conf.d/local.ini