pmx2.prismnet.com has no MX records.
Question and response
Question
dig pmx2.prismnet.com. MX
Answer
The response has no answer records.
Authority
prismnet.com. 300 SOA nsm.prismnet.com. support.prismnet.com. 2024062000 10800 3600 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0