relay.ks.ua has no MX records.
Question and response
Question
dig relay.ks.ua. MX
Answer
The response has no answer records.
Authority
ks.ua. 3600 SOA nix.ns.ua. hostmaster.kherson.ua. 2009098255 3636 1212 1814400 3600
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0