es.colorink.com has no MX records.
Question and response
Question
dig es.colorink.com. MX
Answer
The response has no answer records.
Authority
colorink.com. 3600 SOA NS91.WORLDNIC.com. namehost.WORLDNIC.com. 125112019 10800 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0