lbrtl.com has no MX records.
Question and response
Question
dig lbrtl.com. MX
Answer
The response has no answer records.
Authority
lbrtl.com. 1800 SOA greg.ns.cloudflare.com. dns.cloudflare.com. 2394664484 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0