Question and response
Question
dig _spf.serviciodecorreo.es. TXT
Answer
_spf.serviciodecorreo.es. 3600 TXT "v=spf1 include:_netblock1.serviciodecorreo.es include:_netblock2.serviciodecorreo.es ~all"
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0