mail.duasekawan.com has no MX records.
Question and response
Question
dig mail.duasekawan.com. MX
Answer
The response has no answer records.
Authority
duasekawan.com. 259200 SOA ns1.dutaint.com. hostmaster.dutaservisindo.co.id. 2021102101 86400 3600 1209600 259200
Additional
ns1.dutaint.com. 10800 A 103.242.180.166
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0