mx

This is a quick followup on my progress in deconstructing SPF using Rust.
Today I was able to implement both A and MX mechanisms.

I used to often work with DNS in one of my previous jobs. So I have always had a long running interesting in DNS. Most recently I have been looking into Rust. I wanted to see how easy it might be to use rust to access DNS records, one; because rust is said to be fast, and also because it’s a safe programming language.