docker-compose.mailhog.yml

# Compose file to start the mailhog container.
#
# Mailhog is used on non-live environments to capture all outgoing
# mail from Drupal (or any PHP scripts). The mailhog interface can
# be accessed from http://localhost:8025.
#
# The logic for whether this file is loaded can be found in the
# `env.sh` script.
#
# Here we also mount php.ini settings into other containers to tell
# PHP to send mail to mailhog. Any extra services which send mail
# should be added below.
services:

  mailhog:
    image: mailhog/mailhog
    ports:
      - 8025:8025
    # We have mailhog join both the web and db networks so that all
    # other containers can communicate with mailhog, regardless of
    # which network they're on. We're less concerned about security
    # here because mailhog does not run in the LIVE environment.
    networks:
      - web
      - db
    restart: on-failure

  # This is where we mount the php.ini config inside the other containers. If you
  # add any extra services, add each service below, using the name of each service
  # and mounting the volumne as shown.
  #
  # This docker-compose file is loaded after the environment-specific compose files,
  # so any services defined in those files can also be referenced here.
  #
  # In `env.sh` we tell Docker to merge together the main docker-compose.yml, the
  # environment specific compose file, and this compose file, so the volume
  # defined here for the mailhog-php.ini file will be merged with the other volumes
  # defined for each service.
  drupal:
    volumes:
      - ./docker/mailhog-php.ini:/usr/local/etc/php/conf.d/docker-mailhog.ini:ro
  drupal-cli:
    volumes:
      - ./docker/mailhog-php.ini:/usr/local/etc/php/conf.d/docker-mailhog.ini:ro
  cron:
    volumes:
      - ./docker/mailhog-php.ini:/usr/local/etc/php/conf.d/docker-mailhog.ini:ro