Question and response
Question
dig _spf.rbg.tum.de. TXT
Answer
_spf.rbg.tum.de. 3600 TXT "v=spf1 +ip4:131.159.0.0/23 +ip6:2a09:80c0::/64 ~all"
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0