cp01.lobointernet.com has no MX records.
Question and response
Question
dig cp01.lobointernet.com. MX
Answer
The response has no answer records.
Authority
lobointernet.com. 600 SOA ns1.lobointernet.com. itadmin.lobointernet.com. 2026020501 3600 1800 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0