3 ms·
> Notably, according to the respective RFC 1035 the MX record must contain a domain name and may not directly point to an IP address. Why?
by qwerty456127 6y ago
> Notably, according to the respective RFC 1035 the MX record must contain a domain name and may not directly point to an IP address.
Why?
- eknshow 6y agoDNS uses a binary format on the wire. MX records are defined as a 16-bit integer followed by a domain name. On the wire a domain name is a series of length prefixed octets or a pointer to another set of octets. IP addresses in A and AAAA are represented as a fixed length series of octets. It's apples and oranges.