version: "3.8"

services:
  smtp:
    environment:
      - SENDER_LOGINS_POSTFIX_OVERRIDES
    configs:
      - source: sender_logins
        target: /overrides/sender_logins
      - source: postfix_override
        target: /overrides/postfix.cf

configs:
  sender_logins:
    name: ${STACK_NAME}_sender_logins_${SENDER_LOGIN_VERSIONS}
    file: sender_logins
  postfix_override:
    name: ${STACK_NAME}_postfix_overrides_${POSTFIX_OVERRIDE_VERSION}
    file: postfix.cf.tmpl
    template_driver: golang