server37.web-hosting.com.201.188.199.in-addr.arpa has no MX records.
Question and response
Question
dig server37.web-hosting.com.201.188.199.in-addr.arpa. MX
Answer
The response has no answer records.
Authority
201.188.199.in-addr.arpa. 86400 SOA edns.registrar-servers.com. support.namecheap.com. 1772124925 86400 7200 3600000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0