mx.mail-servicios.com has no TXT records.
Question and response
Question
dig mx.mail-servicios.com. TXT
Answer
The response has no answer records.
Authority
mail-servicios.com. 180 SOA ns10.dnsmadeeasy.com. dns.dnsmadeeasy.com. 2009010308 43200 3600 1209600 180
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0