.mail-send:
  image: gitlab.exxcellent.de:4567/gilden/ci/exxcellent-mail-tool:1.1.0
  stage: send-mail
  variables:
    SMTP_PORT: "25"
    SMTP_AUTH: "off"
  rules:
    - if: $CI_COMMIT_REF_NAME == $CI_DEFAULT_BRANCH