ns3.vtitan.com has no MX records.
Question and response
Question
dig ns3.vtitan.com. MX
Answer
The response has no answer records.
Authority
vtitan.com. 3600 SOA ns1.vtitan.com. dnsadmin.vtitan.com. 2026022103 7200 1800 1209600 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0