Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
datensysteme.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-01 14:43:07 UTC · ↺ Refresh
MX Hostnames
- datensysteme-de.mail.protection.outlook.com
MX Priorities
- datensysteme-de.mail.protection.outlook.com: 20
A / AAAA Records
- 164.30.27.153 ↩ ecs-164-30-27-153.reverse.open-telekom-cloud.com
Mail Server IPs
- 52.101.68.8 ↩ mail-du0pr03cu00100.inbound.protection.outlook.com
- 52.101.73.19 ↩ mail-as8pr04cu00803.inbound.protection.outlook.com
- 52.101.73.8 ↩ mail-am0pr04cu00500.inbound.protection.outlook.com
- 52.101.73.11 ↩ mail-am1pr04cu00103.inbound.protection.outlook.com
- 2a01:111:f403:ca04::b ↩ mail-dbbpr03cu00103.inbound.protection.outlook.com
- 2a01:111:f403:ca09::4 ↩ mail-am0pr04cu00504.inbound.protection.outlook.com
- 2a01:111:f403:ca04::9 ↩ mail-db7pr03cu00601.inbound.protection.outlook.com
- 2a01:111:f403:ca09::20 ↩ mail-as8pr05cu00400.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1.open-telekom-cloud.com verwaltung.datensysteme.de 1 7200 900 1209600 300
Primary NS (mname)
ns1.open-telekom-cloud.com
Admin Email (rname)
verwaltung@datensysteme.de
Serial
1
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
300s
Nameservers (NS)
ns1.open-telekom-cloud.com
ns2.open-telekom-cloud.com
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:mail.datensysteme.net a:mail.datensysteme.net a:otc-de-spf.mms.t-systems-service.com -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected]; ruf=mailto:[email protected]; adkim=r; aspf=r
⚠ p=none — monitoring only, no enforcement
📋 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
6 records- atlassian-domain-verification=Pr/NLT5NwcyywT6dHrq7bxKkDpDkaXZLHQWavPJAWeomCsScHLaPYuyDNvGsZVq1
- SPFv=spf1 include:spf.protection.outlook.com include:mail.datensysteme.net a:mail.datensysteme.net a:otc-de-spf.mms.t-systems-service.com -all
- MS=ms78276435
- anthropic-domain-verification-b3t6jr=3A6LreUUVy15aIcxV6MF382IB
- google-site-verification=rs_uBiGPli0JEPjBhyZzl12aSwkrOCJvKj44A2Ywfm0
- notion-domain-verification=mGBNeBtBKpY3UcMna8dxraxaMOA1btfgI37MFeac68y
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