esa02.webadmin1.net has no MX records.
Question and response
Question
dig esa02.webadmin1.net. MX
Answer
The response has no answer records.
Authority
webadmin1.net. 600 SOA dns01.dipcon.com. registry.ports.net. 2021041400 3600 1800 604800 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0