cosmopolitanschool.de

Valid Email Server
Domain Lookup › cosmopolitanschool.de

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
cosmopolitanschool.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-04-03 22:12:57 UTC · ↺ Refresh

MX Hostnames

  • cosmopolitanschool-de.mail.protection.outlook.com

MX Priorities

  • cosmopolitanschool-de.mail.protection.outlook.com: 10

A / AAAA Records

  • 217.160.0.47 ↩ 217-160-0-47.elastic-ssl.ui-r.com
  • 2001:8d8:100f:f000::289 ↩ 2001-08d8-100f-f000-0000-0000-0000-0289.elastic-ssl.ui-r.com

Mail Server IPs

  • 52.101.73.22 ↩ mail-am7pr05cu00106.inbound.protection.outlook.com
  • 52.101.68.12 ↩ mail-db9pr02cu00204.inbound.protection.outlook.com
  • 52.101.73.8 ↩ mail-am0pr04cu00500.inbound.protection.outlook.com
  • 52.101.73.24 ↩ mail-as8pr05cu00300.inbound.protection.outlook.com
  • 2a01:111:f403:ca04::d ↩ mail-db6pr03cu00105.inbound.protection.outlook.com
  • 2a01:111:f403:ca09::d ↩ mail-as9pr05cu01305.inbound.protection.outlook.com
  • 2a01:111:f403:ca04::8 ↩ mail-db5pr02cu00100.inbound.protection.outlook.com
  • 2a01:111:f403:ca04::7 ↩ mail-db4pr02cu00307.inbound.protection.outlook.com

SOA Record

Raw SOA ns1051.ui-dns.org hostmaster.1und1.com 2017060258 28800 7200 604800 600
Primary NS (mname)
ns1051.ui-dns.org
Admin Email (rname)
hostmaster@1und1.com
Serial
2017060258
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
600s

Nameservers (NS)

ns1104.ui-dns.biz
ns1060.ui-dns.com
ns1109.ui-dns.de
ns1051.ui-dns.org

SPF Record

✓ Strict (-all)
v=spf1 ip4:5.9.159.107 ip4:5.9.159.108 ip4:92.62.193.130 include:spf.protection.outlook.com a:mail.cosmopolitanschool.de -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ Missing

No DMARC record — emails cannot be rejected on auth failure.

DKIM Selectors

✓ 4 found
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._domainkey
✓ 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
  • google-site-verification=QYUXUaOB7kLfTm9UwS6GlCKzvqTRqkQf4tirqrRcwdo
  • ms-domain-verification=47c24913-c725-4730-984c-c93bdbc89cf7
  • MS=ms60357066
  • SPFv=spf1 ip4:5.9.159.107 ip4:5.9.159.108 ip4:92.62.193.130 include:spf.protection.outlook.com a:mail.cosmopolitanschool.de -all
  • apple-domain-verification=yDtwfNPaLP3RwYYQ
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