c2free.ru has no MX records.
Question and response
Question
dig c2free.ru. MX
Answer
The response has no answer records.
Authority
c2free.ru. 1800 SOA camilo.ns.cloudflare.com. dns.cloudflare.com. 2393590619 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0