smtp800-2.hostingatlantic.com has no MX records.
Question and response
Question
dig smtp800-2.hostingatlantic.com. MX
Answer
The response has no answer records.
Authority
hostingatlantic.com. 300 SOA ns3.1-hostingservice.com. domains.1-hostingservice.com. 2025052214 3600 60 604800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0