Question and response
Question
dig mx01.ecn.purdue.edu. RRSIG
Answer
The response has no answer records.
Authority
ecn.purdue.edu. 86400 SOA harbor.ecn.purdue.edu. hostmaster.ecn.purdue.edu. 2389692204 10800 3600 3600000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0