gdfb.de

Valid Email Server
Domain Lookup › gdfb.de

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
gdfb.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-03-29 19:57:31 UTC · ↺ Refresh

MX Hostnames

  • mail3.marum.de
  • mail2.marum.de
  • mail1.marum.de

MX Priorities

  • mail2.marum.de: 20
  • mail1.marum.de: 10
  • mail3.marum.de: 100

A / AAAA Records

  • 134.102.234.81 ↩ www.gdfb.de

Mail Server IPs

  • 134.102.234.18 ↩ mail2.marum.de
  • 134.102.234.17 ↩ mail1.marum.de
  • 134.102.234.19 ↩ mail3.marum.de

SOA Record

Raw SOA ines.zfn.uni-bremen.de helms.zfn.uni-bremen.de 2026030123 28800 7200 1209600 86400
Primary NS (mname)
ines.zfn.uni-bremen.de
Admin Email (rname)
helms@zfn.uni-bremen.de
Serial
2026030123
Refresh
28800s
Retry
7200s
Expire
1209600s
Minimum TTL
86400s

Nameservers (NS)

dns-2.dfn.de
ines.zfn.uni-bremen.de
ns.informatik.uni-bremen.de

SPF Record

✓ Strict (-all)
v=spf1 mx ip4:134.102.234.19 ip4:134.102.234.126 -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected]; ruf=mailto:[email protected]; sp=none; fo=0:s; adkim=r; aspf=r
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: none

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

1 record
  • SPFv=spf1 mx ip4:134.102.234.19 ip4:134.102.234.126 -all
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