- elements. Unless "nospf" is specified, it prints "-all" SPF policy. If
- "y" is specified, it adds "y.domain" address with predefined $Y6
- address and "-all" SPF policy
+ elements. Unless "mailable" is specified, it prints "-all" SPF policy
+ and sets null MX. If "y" is specified, it adds "y.domain" address with
+ predefined $Y6 address with "-all" SPF policy and null MX