_imap._tcp.rcn.com. TXT RRSIG NSEC
Question and response
Question
dig _spf.rcn.com. NSEC
Answer
_spf.rcn.com. 86400 NSEC _imap._tcp.rcn.com. TXT RRSIG NSEC
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0