gateway.karoo.kcom.com has no MX records.
Question and response
Question
dig gateway.karoo.kcom.com. MX
Answer
The response has no answer records.
Authority
karoo.kcom.com. 28800 SOA ibex.kcom.com. hostmaster.kcom.com. 2025081201 28800 7200 604800 28800
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0