mail.elta-kabel.com has no MX records.
Question and response
Question
dig hawk.supernovabih.net. MX
Answer
The response has no answer records.
Authority
supernovabih.net. 3600 SOA phobos.blic.net. hostmaster.blicnet.ba. 2026022501 86400 3600 1209600 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0