ns.cloudsigma.com has no MX records.
Question and response
Question
dig ns.cloudsigma.com. MX
Answer
The response has no answer records.
Authority
cloudsigma.com. 60 SOA ns.cloudsigma.com. operations.cloudsigma.com. 2026030901 1200 10800 1814400 60
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0