argument_specs:
  main:
    options:
      ansible_hostname:
        type: "str"
        required: true
      mail_domain:
        type: "str"
        required: true
      postfix_smtp_server:
        type: "str"
        required: true
      postfix_smtp_port:
        type: "int"
        required: true
      postfix_smtp_user:
        type: "str"
        required: true
      postfix_smtp_pass:
        type: "str"
        required: true