null-30.onagap.com has no MX records.
Question and response
Question
dig null-30.onagap.com. MX
Answer
The response has no answer records.
Authority
onagap.com. 60 SOA ns3.systemlifeline.com. alltechs.systemlifeline.com. 2026011801 3600 1800 1209600 60
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0