app1.coaction.com has no MX records.
Question and response
Question
dig app1.coaction.com. MX
Answer
The response has no answer records.
Authority
coaction.com. 3600 SOA ns2.tierra.net. hostmaster.tierra.net. 2024021301 10800 900 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0