rfh-koeln.de

Valid Email Server
Domain Lookup › rfh-koeln.de

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
rfh-koeln.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-04-01 23:01:15 UTC · ↺ Refresh

MX Hostnames

  • a1851.mx.srv.dfn.de
  • c1851.mx.srv.dfn.de
  • b1851.mx.srv.dfn.de

MX Priorities

  • b1851.mx.srv.dfn.de: 10
  • a1851.mx.srv.dfn.de: 10
  • c1851.mx.srv.dfn.de: 10

A / AAAA Records

  • 78.46.0.152 ↩ dedi2252.your-server.de

Mail Server IPs

  • 194.95.234.129 ↩ b1851.mx.srv.dfn.de
  • 194.95.232.129 ↩ a1851.mx.srv.dfn.de
  • 194.95.238.129 ↩ c1851.mx.srv.dfn.de

SOA Record

Raw SOA ans1.rh-koeln.de hostmaster.rfh-koeln.de 2026032702 1200 120 2419200 3600
Primary NS (mname)
ans1.rh-koeln.de
Admin Email (rname)
hostmaster@rfh-koeln.de
Serial
2026032702
Refresh
1200s
Retry
120s
Expire
2419200s
Minimum TTL
3600s

Nameservers (NS)

ans2.rh-koeln.de
deneb.dfn.de
ans1.rh-koeln.de

SPF Record

✗ Missing

No SPF record — domain is unprotected against spoofing.

⚠ No SPF record found. Email servers cannot verify authorized senders.

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

7 records
  • facebook-domain-verification=j1q4yizayhuibejcv4n3m52tyvf6h6
  • adobe-idp-site-verification=934e3408e51d196824596d7102a13ee03bbf30c280675e8ba67b8434a918d0ff
  • "v=spf1 include:spf.protection.outlook.com ip4:195.37.22.5 a:mx01.verwaltung.rfh-koeln.de a:mx02.verwaltung.rfh-koeln.de a:edumail01.rfh-koeln.de a:edumail02.rfh-koeln.de a:edumail.rfh-koeln.de a:mailbox01.rfh-koeln.de a:mailbox02.rfh-koeln.de a:mail.rfh-koeln.de a:mailbox.rfh-koeln.de" " ip4:195.37.23.198 ~all"
  • MS=5F015BA84DB1BC7A3AE2C58FF504CDA2A5CDFE6A
  • google-site-verification=ni3nAMWfVxG23Rv2yzJrHzdwcLHiAdQpyKE_T4OTs24
  • apple-domain-verification=ZTlaK8DH4LXcXIkA
  • HARICA-78ex4DgIKnPsTlqExLa
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