smtp.nanolearning.com has no TXT records.
Question and response
Question
dig smtp.nanolearning.com. TXT
Answer
The response has no answer records.
Authority
nanolearning.com. 3600 SOA ns1.hyp.net. hostmaster.domeneshop.no. 1772177519 14400 3600 1209600 3600
Additional
. 0 OPT ; payload 1400, xrcode 0, version 0, flags 0