sharedwebip.vworker03.irz42.net has no MX records.
Question and response
Question
dig sharedwebip.vworker03.irz42.net. MX
Answer
The response has no answer records.
Authority
irz42.net. 600 SOA p-dns.irz42.net. hostmaster.irz42.net. 2026022601 28800 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0