ipv4.telemach.net has no MX records.
Question and response
Question
dig ipv4.telemach.net. MX
Answer
The response has no answer records.
Authority
ipv4.telemach.net. 1800 SOA ns1.telemach.net. domene.telemach.si. 1 28800 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0