Question and response
Question
dig envios.tec.mx. TXT
Answer
envios.tec.mx. 3600 TXT "v=spf1 include:_spf.google.com include:sendgrid.net include:mailgun.org -all"
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0