_25._tcp.mx2.open-xchange.com. A TXT RRSIG NSEC
Question and response
Question
dig mx2.open-xchange.com. NSEC
Answer
mx2.open-xchange.com. 300 NSEC _25._tcp.mx2.open-xchange.com. A TXT RRSIG NSEC
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0