mail.ised.edu.do has no TXT records.
Question and response
Question
dig mail.ised.edu.do. TXT
Answer
The response has no answer records.
Authority
ised.edu.do. 1800 SOA edna.ns.cloudflare.com. dns.cloudflare.com. 2398462849 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0