Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
cvut.cz
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-24 15:20:12 UTC · ↺ Refresh
MX Hostnames
- cvut-cz.i-v1.mx.microsoft
MX Priorities
- cvut-cz.i-v1.mx.microsoft: 0
A / AAAA Records
- 147.32.3.202 ↩ webmm-pub.is.cvut.cz
Mail Server IPs
- 52.101.68.16 ↩ mail-db4pr02cu00400.inbound.protection.outlook.com
- 52.101.68.10 ↩ mail-dbbpr03cu00102.inbound.protection.outlook.com
- 52.101.73.4 ↩ mail-am0pr83cu00404.inbound.protection.outlook.com
- 52.101.68.5 ↩ mail-du2pr03cu00105.inbound.protection.outlook.com
- 2a01:111:f403:ca04::e ↩ mail-db8pr02cu00106.inbound.protection.outlook.com
- 2a01:111:f403:ca04::a ↩ mail-du0pr03cu00102.inbound.protection.outlook.com
- 2a01:111:f403:ca09::f ↩ mail-am7pr05cu00307.inbound.protection.outlook.com
- 2a01:111:f403:ca09::5 ↩ mail-am1pr04cu00105.inbound.protection.outlook.com
SOA Record
Raw SOA
ns.cvut.cz hostmaster.cvut.cz 12452 14401 3600 1209600 86400
Primary NS (mname)
ns.cvut.cz
Admin Email (rname)
hostmaster@cvut.cz
Serial
12452
Refresh
14401s
Retry
3600s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
nss.cvut.cz
ns.cvut.cz
SPF Record
✓ Strict (-all)
v=spf1 ip4:147.32.235.25 ip6:2001:718:2:2202::25 include:spf.protection.outlook.com include:_spf1.cvut.cz -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
7 records- apple-domain-verification=C6yIfuZzShjeDRIF
- seIBuNBcvNeK9+Evkcig5KdavRRhFXEzhGCeU3BmsLh6L7Mn8VU0nd9RFxwJ7mKwKVETcgRw/COCLKtAjLRsjg==
- SPFv=spf1 ip4:147.32.235.25 ip6:2001:718:2:2202::25 include:spf.protection.outlook.com include:_spf1.cvut.cz -all
- google-site-verification=CYYVcmesbYpla_zqVXhOjstTrXfGdoPFA23lBIJ
- atlassian-domain-verification=qCOXRhgb/aDA39Ywd9RBNeUvFjtLRjQ4e1ax9kZuAhVHjbGrOHi/KTAA8qxPFsg3
- atlassian-domain-verification=rDtcgrRqfCu57VGnzGB8tCqBnMPAks3o5jhfw7hBb4uT/84gkk9aNX10HZjlwTJS
- cisco-ci-domain-verification=e5bc5596041bbfe889ea0981934f35e45ff09c125359cdd2963be8a813050bd
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