d78.westmaster.com has no MX records.
Question and response
Question
dig d78.westmaster.com. MX
Answer
The response has no answer records.
Authority
westmaster.com. 300 SOA ns1.master.cz. support.master.cz. 2023052500 7200 1800 1209600 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0