smtp.abbusiness.info has no MX records.
Question and response
Question
dig smtp.abbusiness.info. MX
Answer
The response has no answer records.
Authority
abbusiness.info. 300 SOA x.ns.joker.com. hostmaster.joker.com. 2025111843 14400 3600 604800 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0