MX DNS

DNS utilities for mail servers. Currently this crate supports reverse DNS lookups and lookups against dns based blocklists.

Example

```rust use mxdns::{MxDns, FCrDNS};

let blocklists = vec!["zen.spamhaus.org.","dnsbl-1.uceprotect.net."]; let mxdns = MxDns::new(blocklists).unwrap();

// Check if an IP Address is present on blocklists let isblocked = mxdns.isblocked([127, 0, 0, 2]).unwrap(); assert!(is_blocked);

// Reverse lookup a DNS address let rdns = mxdns.reversedns([193, 25, 101, 5]).unwrap().unwrap(); asserteq!(rdns, "mail.alienscience.org.");

// Check that the ip resolved from the name obtained by the reverse dns matches the ip if let Ok(FCrDNS::Confirmed(_domain)) = mxdns.fcrdns([193, 25, 101, 5]) { // _domain is Confirmed } ```