Zone apex
Start of authority
Email
Serial
201701285
Refresh
30m
Retry
15m
Expire
14d
Negative cache TTL
10m
Question and response
Question
dig spf.alumni.cuhk.net. SOA
Answer
The response has no answer records.
Authority
alumni.cuhk.net. 600 SOA ddi-gm1.itsc.cuhk.edu.hk. hostmaster.cuhk.edu.hk. 201701285 1800 900 1209600 600
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0