mail1.legistai.com has no MX records.
Question and response
Question
dig mail1.legistai.com. MX
Answer
The response has no answer records.
Authority
legistai.com. 1800 SOA camilo.ns.cloudflare.com. dns.cloudflare.com. 2397206212 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0