mx3.zoho.com has no TXT records.
Question and response
Question
dig mx3.zoho.com. TXT
Answer
The response has no answer records.
Authority
zoho.com. 300 SOA ns1.zohocorp.com. dnsadmin.vtitan.com. 2026022206 7200 1800 1209600 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0