mail.hostpro.ua has no MX records.
Question and response
Question
dig mail.hostpro.ua. MX
Answer
The response has no answer records.
Authority
hostpro.ua. 1800 SOA kallie.ns.cloudflare.com. dns.cloudflare.com. 2394918058 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0