74.91.209.186.dbnet.com.vc has no MX records.
Question and response
Question
dig 74.91.209.186.dbnet.com.vc. MX
Answer
The response has no answer records.
Authority
dbnet.com.vc. 1800 SOA anna.ns.cloudflare.com. dns.cloudflare.com. 2395878434 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0