mail01.latisys.net has no MX records.
Question and response
Question
dig mail01.latisys.net. MX
Answer
The response has no answer records.
Authority
latisys.net. 3600 SOA ns1.dfw.databank.com. ipadmin.databank.com. 2026021903 7200 3600 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0