dfn.de

Valid Email Server
Domain Lookup › dfn.de

Domain Overview

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

Checked via [email protected] · 2026-04-03 11:08:22 UTC · ↺ Refresh

MX Hostnames

  • a1001.mx.srv.dfn.de
  • c1001.mx.srv.dfn.de
  • b1001.mx.srv.dfn.de

MX Priorities

  • a1001.mx.srv.dfn.de: 10
  • c1001.mx.srv.dfn.de: 10
  • b1001.mx.srv.dfn.de: 10

A / AAAA Records

  • 37.208.106.105 ↩ www.dfn.de
  • 2a00:d0c0:c:2109::11 (no PTR)

Mail Server IPs

  • 194.95.233.3 ↩ a1001.mx.srv.dfn.de
  • 2001:638:d:c301:acdc:1979:2:1 ↩ a1001.mx.srv.dfn.de
  • 194.95.239.3 ↩ c1001.mx.srv.dfn.de
  • 2001:638:d:c303:acdc:1979:2:1 ↩ c1001.mx.srv.dfn.de
  • 194.95.235.3 ↩ b1001.mx.srv.dfn.de
  • 2001:638:d:c302:acdc:1979:2:1 ↩ b1001.mx.srv.dfn.de

SOA Record

Raw SOA ns1.dfn.de hostmaster.dfn.de 1775119903 28800 7200 3024000 3600
Primary NS (mname)
ns1.dfn.de
Admin Email (rname)
hostmaster@dfn.de
Serial
1775119903
Refresh
28800s
Retry
7200s
Expire
3024000s
Minimum TTL
3600s

Nameservers (NS)

ns1.dfn.de
ns2.dfn.de
ns3.dfn.de
ns4.dfn.de

SPF Record

✓ Soft Fail (~all)
v=spf1 include:_spf.s1004.mx.srv.dfn.de a:deneb.dfn.de include:_spf.dfn-cert.de include:_spft.telekom.com ~all
📊 DNS lookups: 5/10
~ Soft fail (~all) — moderate enforcement

DMARC Record

✗ p=none
v=DMARC1; p=none
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)

DKIM Selectors

✓ 1 found
s1._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: s1

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

All TXT Records

4 records
  • SPFv=spf1 include:_spf.s1004.mx.srv.dfn.de a:deneb.dfn.de include:_spf.dfn-cert.de include:_spft.telekom.com ~all
  • google-site-verification=aNjf9WiXv4G4mjXnYovwIjOS01qfUjBGQbV5xomVJ44
  • google-site-verification=AHsv25T5W2sYiYNmYvU6z8a2G1H_7FM0vJOZf5uOhAE
  • apple-domain-verification=TdQByV6omDQj06SD
Full email verification for dfn.de

Run SMTP check, SPF/DKIM/DMARC and catch-all detection.

SPF / DKIM / DMARC Get 1,000 Free Credits