relay.paco.net has no MX records.
Question and response
Question
dig relay.paco.net. MX
Answer
The response has no answer records.
Authority
paco.net. 3600 SOA ns.paco.net. hostmaster.paco.net. 2025072213 3600 7200 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0