mail2-bck.iservicesmail.com has no MX records.
Question and response
Question
dig mail2-bck.iservicesmail.com. MX
Answer
The response has no answer records.
Authority
iservicesmail.com. 86400 SOA ns1.comunitel.net. hostmaster.comunitel.net. 2023122100 86400 7200 3600000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0