mail.ashtonschool.edu.do has no MX records.
Question and response
Question
dig mail.ashtonschool.edu.do. MX
Answer
The response has no answer records.
Authority
ashtonschool.edu.do. 10800 SOA ns8615.hostgator.com. root.gator4308.hostgator.com. 2026022001 86400 7200 3600000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0