gateway.kingston-internet.net has no MX records.
Question and response
Question
dig gateway.kingston-internet.net. MX
Answer
The response has no answer records.
Authority
kingston-internet.net. 28800 SOA ibex.kingston-internet.co.uk. hostmaster.kingston-internet.net. 2025101201 28800 7200 604800 28800
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0