rtg2.multacom.com has no MX records.
Question and response
Question
dig rtg2.multacom.com. MX
Answer
The response has no answer records.
Authority
multacom.com. 3600 SOA ns2.multacom.com. webmaster.multacom.com. 2025082901 43200 900 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0