mail.ostkom.lv has no MX records.
Question and response
Question
dig mail.ostkom.lv. MX
Answer
The response has no answer records.
Authority
ostkom.lv. 600 SOA ns2.ostkom.lv. info.ostkom.lv. 2026013001 7200 3600 2419200 38400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0