_tcp.uni-rostock.de. TXT RRSIG NSEC
Question and response
Question
dig _spf.uni-rostock.de. NSEC
Answer
_spf.uni-rostock.de. 900 NSEC _tcp.uni-rostock.de. TXT RRSIG NSEC
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0