Zone apex
Start of authority
Email
Serial
2511171718
Refresh
20m
Retry
2m 24s
Expire
21d
Negative cache TTL
2h
Question and response
Question
dig mailsec.protonmail.ch. SOA
Answer
The response has no answer records.
Authority
protonmail.ch. 1200 SOA ns1.protonmail.ch. support.protonmail.ch. 2511171718 1200 144 1814400 7200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0