kreuzgymnasium.de

Valid Email Server
Domain Lookup › kreuzgymnasium.de

Domain Overview

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

Checked via [email protected] · 2026-03-27 21:41:01 UTC · ↺ Refresh

MX Hostnames

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

MX Priorities

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

A / AAAA Records

  • 217.160.0.91 ↩ 217-160-0-91.elastic-ssl.ui-r.com
  • 2001:8d8:100f:f000::28e ↩ 2001-08d8-100f-f000-0000-0000-0000-028e.elastic-ssl.ui-r.com

Mail Server IPs

  • 52.101.68.12 ↩ mail-db9pr02cu00204.inbound.protection.outlook.com
  • 52.101.73.30 ↩ mail-am7pr05cu00306.inbound.protection.outlook.com
  • 52.101.68.18 ↩ mail-db4pr02cu00302.inbound.protection.outlook.com
  • 52.101.68.39 ↩ mail-db7pr03cu00607.inbound.protection.outlook.com
  • 2a01:111:f403:ca09::1 ↩ mail-as9pr07cu00301.inbound.protection.outlook.com
  • 2a01:111:f403:ca04::a ↩ mail-du0pr03cu00102.inbound.protection.outlook.com
  • 2a01:111:f403:ca09::8 ↩ mail-as2pr05cu00100.inbound.protection.outlook.com
  • 2a01:111:f403:ca04::5 ↩ mail-db3pr0202cu00205.inbound.protection.outlook.com

SOA Record

Raw SOA ns1076.ui-dns.com hostmaster.1und1.de 2017020481 28800 7200 604800 300
Primary NS (mname)
ns1076.ui-dns.com
Admin Email (rname)
hostmaster@1und1.de
Serial
2017020481
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
300s

Nameservers (NS)

ns1076.ui-dns.de
ns1076.ui-dns.com
ns1076.ui-dns.biz
ns1076.ui-dns.org

SPF Record

✓ Strict (-all)
v=spf1 ip4:217.92.131.77 a mx include:spf.protection.outlook.com include:_spf-eu.ionos.com -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ Missing

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

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

2 records
  • apple-domain-verification=tNFtRzfdEOtjMd3j
  • SPFv=spf1 ip4:217.92.131.77 a mx include:spf.protection.outlook.com include:_spf-eu.ionos.com -all
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