sender160.eu.zcsend.net has no MX records.
Question and response
Question
dig sender160.eu.zcsend.net. MX
Answer
The response has no answer records.
Authority
zcsend.net. 600 SOA ns1.vtitan.com. dnsadmin.vtitan.com. 2026030300 7200 1800 1209600 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0