mail.oksimel19.net has no MX records.
Question and response
Question
dig mail.oksimel19.net. MX
Answer
The response has no answer records.
Authority
oksimel19.net. 38400 SOA ns.oksimel19.net. postmaster.oksimel19.net. 2025021202 10800 3600 1209600 38400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0