vps4.jeserga.es has no MX records.
Question and response
Question
dig vps4.jeserga.es. MX
Answer
The response has no answer records.
Authority
jeserga.es. 60 SOA ns1.jeserga.es. hostmaster.jeserga.es. 2026022802 28800 7200 1209600 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0