Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
uoou.cz
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-17 21:13:10 UTC · ↺ Refresh
MX Hostnames
- uoou-cz.u-v1.mx.microsoft
MX Priorities
- uoou-cz.u-v1.mx.microsoft: 0
A / AAAA Records
- 217.16.184.42 ↩ simplo.vshosting.cz
- 2a00:1ed0:123::b ↩ simplo.vshosting.cz
Mail Server IPs
- 52.101.68.21 ↩ mail-db4pr02cu00205.inbound.protection.outlook.com
- 52.101.68.18 ↩ mail-db4pr02cu00302.inbound.protection.outlook.com
- 52.101.73.11 ↩ mail-am1pr04cu00103.inbound.protection.outlook.com
- 52.101.73.153 ↩ mail-as8pr05cu00401.inbound.protection.outlook.com
- 2a01:111:f403:ca09::d ↩ mail-as9pr05cu01305.inbound.protection.outlook.com
- 2a01:111:f403:ca04::10 ↩ mail-dbapr03cu00100.inbound.protection.outlook.com
- 2a01:111:f403:ca09::b ↩ mail-am7pr05cu00103.inbound.protection.outlook.com
- 2a01:111:f403:ca04::f ↩ mail-db7pr03cu00507.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1.ignum.com hostmaster.ignum.cz 2026031201 10800 3600 604800 3600
Primary NS (mname)
ns1.ignum.com
Admin Email (rname)
hostmaster@ignum.cz
Serial
2026031201
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
ns2.ignum.cz
ns1.ignum.com
SPF Record
✓ Strict (-all)
v=spf1 ip4:217.16.184.42 ip4:23.88.116.92 ip4:159.69.184.66 ip4:80.95.253.224/27 include:spf.protection.outlook.com -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 392 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
5 records- SPFv=spf1 ip4:217.16.184.42 ip4:23.88.116.92 ip4:159.69.184.66 ip4:80.95.253.224/27 include:spf.protection.outlook.com -all
- _kk1eqmceysqi70f0tyypwch01rdfhq8
- google-site-verification=N9Y5XO5-AeF2HLMjr3asb0sYpmkT0VHwG3bQmE9Wdfs
- atlassian-sending-domain-verification=d6602935-7698-4424-b6a3-db8f3655b120
- atlassian-domain-verification=jwcO9QWvJeaicJpUr/iLA7/HmkGpx0nueTZNRcpYugWoI0PCQ8V5znBpoDClRq4T
Full email verification for uoou.cz
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
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