gerdes-kollegen.com

Valid Email Server
Domain Lookup › gerdes-kollegen.com

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
gerdes-kollegen.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-19 21:30:56 UTC · ↺ Refresh

MX Hostnames

  • gerdeskollegen-com01e.mail.protection.outlook.com

MX Priorities

  • gerdeskollegen-com01e.mail.protection.outlook.com: 0

A / AAAA Records

  • 217.160.0.69 ↩ 217-160-0-69.elastic-ssl.ui-r.com
  • 2001:8d8:100f:f000::2f4 ↩ 2001-08d8-100f-f000-0000-0000-0000-02f4.elastic-ssl.ui-r.com

Mail Server IPs

  • 52.101.68.29 ↩ mail-dbapr03cu00105.inbound.protection.outlook.com
  • 52.101.68.12 ↩ mail-db9pr02cu00204.inbound.protection.outlook.com
  • 52.101.68.27 ↩ mail-db7pr03cu00503.inbound.protection.outlook.com
  • 52.101.68.39 ↩ mail-db7pr03cu00607.inbound.protection.outlook.com
  • 2a01:111:f403:ca09::2 ↩ mail-am0pr83cu00402.inbound.protection.outlook.com
  • 2a01:111:f403:ca09::5 ↩ mail-am1pr04cu00105.inbound.protection.outlook.com
  • 2a01:111:f403:ca04::9 ↩ mail-db7pr03cu00601.inbound.protection.outlook.com
  • 2a01:111:f403:ca04::7 ↩ mail-db4pr02cu00307.inbound.protection.outlook.com

SOA Record

Raw SOA ns1055.ui-dns.com hostmaster.1und1.de 2016071656 28800 7200 604800 300
Primary NS (mname)
ns1055.ui-dns.com
Admin Email (rname)
hostmaster@1und1.de
Serial
2016071656
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
300s

Nameservers (NS)

ns1055.ui-dns.biz
ns1055.ui-dns.de
ns1055.ui-dns.org
ns1055.ui-dns.com

SPF Record

✓ Strict (-all)
v=spf1 ip4:91.249.133.131 include:spf.protection.outlook.com include:maildomain._spf.datev.de include:datevnet._spf.datev.de -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ Missing

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

DKIM Selectors

✗ None detected

No DKIM records found for common selectors — your provider may use a custom selector name.

Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses

All TXT Records

3 records
  • google-site-verification=vMVpwlqzomjGiPisLhCLYcRFA3A8cXJWv60VG-DzEPA
  • SPFv=spf1 ip4:91.249.133.131 include:spf.protection.outlook.com include:maildomain._spf.datev.de include:datevnet._spf.datev.de -all
  • BkpJBLNXEf7kTS1O8FhtBCRuUdDPLfGakBTpAsDuwfY=
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