ipesa01.pnshs.com has no MX records.
Question and response
Question
dig ipesa01.pnshs.com. MX
Answer
The response has no answer records.
Authority
pnshs.com. 60 SOA a1-66.akam.net. admin.dnstinations.com. 13 10800 3600 2419200 60
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0