ns2.design-b2b.com has no MX records.
Question and response
Question
dig ns2.design-b2b.com. MX
Answer
The response has no answer records.
Authority
design-b2b.com. 100 SOA ns1.design-b2b.com. info.design-b2b.com. 2025081522 18000 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0