services/nextcloud/docker-compose.smtp.yml

version: "3.8"

services:
  nextcloud-fpm:
    environment:
      &smtp-configuration
      SMTP_HOST: ${SMTP_HOST:?err}
      SMTP_SECURE: ${SMTP_SECURE:-ssl}
      SMTP_PORT: ${SMTP_PORT:-465}
      SMTP_AUTHTYPE: ${SMTP_AUTHTYPE:-LOGIN}
      SMTP_NAME: ${SMTP_NAME:?err}
      SMTP_PASSWORD: ${SMTP_PASSWORD:?err}
      MAIL_FROM_ADDRESS: ${MAIL_FROM_ADDRESS:?err}
      MAIL_DOMAIN: ${MAIL_DOMAIN:?err}

  nextcloud-cron:
    environment:
      <<: *smtp-configuration