sales.upc-cablecom.ch has no MX records.
Question and response
Question
dig sales.upc-cablecom.ch. MX
Answer
The response has no answer records.
Authority
upc-cablecom.ch. 86400 SOA ns1.cablecom.net. hostmaster.cablecom.net. 2025120209 28800 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0