systems4.checkpointsolutions.net has no MX records.
Question and response
Question
dig systems4.checkpointsolutions.net. MX
Answer
The response has no answer records.
Authority
checkpointsolutions.net. 3600 SOA ns.adams.net. noc.adamstel.com. 2025121901 7200 1800 1209600 43200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0