Zone apex
Start of authority
Email
Serial
2026022301
Refresh
3h
Retry
30m
Expire
14d
Negative cache TTL
1h
Question and response
Question
dig spf.smtp.cz. SOA
Answer
The response has no answer records.
Authority
smtp.cz. 3600 SOA ns.dns4.cz. hostmaster.active24.cz. 2026022301 10800 1800 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0