ck.bezeqint.net has no MX records.
Question and response
Question
dig ck.bezeqint.net. MX
Answer
The response has no answer records.
Authority
bezeqint.net. 3600 SOA da1.bezeqint.net. postmaster.bezeqint.net. 2025118120 3600 600 1209600 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0