IPv6 Addresses
citaf.cz. 900 IN AAAA 2001:718:FF05:202:0:0:0:243
Name Servers
citaf.cz. 899 IN NS nsa.ces.net. citaf.cz. 899 IN NS nsa.cesnet.cz. citaf.cz. 899 IN NS nsa.ten.cz.
Mail Servers
citaf.cz. 900 IN MX 10 ag1.cesnet.cz. citaf.cz. 900 IN MX 10 ag2.cesnet.cz.
SOA Details
citaf.cz. 900 IN SOA nsa.cesnet.cz. hostmaster.cesnet.cz. 2021090812 28800 7200 1814400 900
Certificate Authority Authorization
No CAA records were returned at this registrable domain name. With no CAA policy, any public certificate authority (CA) may issue TLS certificates for names under this zone unless a parent publishes CAA; add issue / issuewild / iodef records to restrict issuance.
DMARC
Organizational policy (p): how receivers treat mail that fails aligned DMARC checks — none (monitor only), quarantine (often junk), or reject (block).
pct: share of mail that gets quarantine/reject; 100 = all failing messages (default).
100Aggregate DMARC reports (ZIP/XML). Optional but recommended for visibility.
Forensic (per-failure) reports. Often omitted for privacy or volume.
citaf.cz. 900 IN DMARC v=DMARC1; p=reject
DKIM
No DKIM TXT with `v=DKIM1` was returned for the selector names we probe automatically.
SPF (Sender Policy Framework)
| Qualifier | Mechanism | Target / value | Valid | Details |
|---|---|---|---|---|
| - Fail | all |
—
|
|
citaf.cz. 900 IN TXT "v=spf1 -all"
MTA-STS
This hostname does not publish an MTA-STS policy (no v=STSv1 TXT at _mta-sts.<name> and/or no policy at https://mta-sts.<name>/.well-known/mta-sts.txt).
DNSSEC Public Keys
citaf.cz. 900 IN DNSKEY 257 3 13 sIyAv8ZL0JIDUqpvh8iS3Qy8AOteYuAR1qVPzUbfdOX0Ic+3QDK4Vhb8n8w7PGUewE33EARGHEc8RHBz6sih2w== citaf.cz. 900 IN DNSKEY 256 3 13 aD0VoJGNjZqsPbpUb8EYJ5ghVW93RXBxEi58CGaAuj7eexWOW3qBBh03idsAKYmwtEdBrwtdIfBu9otGOpjhow==
Delegation Signer
citaf.cz. 1200 IN DS 59329 13 2 E4B249D337B5E3677BEA1F311F3822D1ED41B27DA3F1A51C02091B8AD8556846
DNSSEC Signatures
citaf.cz. 900 IN RRSIG A 13 2 900 1787850407 1785253007 20223 citaf.cz puJ3QwX1xFAWSzdnPWnnzRtF2J8Zqao3UOI7eW/G0cwMuj2b9y0vb6VvT9uGzOllDS6oI51/z/9AD4j+60nA9Q==