etrn-com.b.mx.etrn.com has no MX records.
Question and response
Question
dig etrn-com.b.mx.etrn.com. MX
Answer
The response has no answer records.
Authority
mx.etrn.com. 3600 SOA ns1.fmt.etrn.com. hostmaster.etrn.com. 2023072471 1800 900 1814400 900
Additional
The response has no additional records.