mx1.netsolmail.net has no TXT records.
Question and response
Question
dig mx1.netsolmail.net. TXT
Answer
The response has no answer records.
Authority
netsolmail.net. 3600 SOA ns1.netsolmail.com. namehost.worldnic.com. 109012019 10800 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0