rfk-immobilienverwaltung.de

Valid Email Server
Domain Lookup › rfk-immobilienverwaltung.de

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
rfk-immobilienverwaltung.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-04-02 03:03:32 UTC · ↺ Refresh

Add email validation to your forms — free

Add our free script to block 10,000+ disposable domains + perform other checks. No signup, unlimited checks.

MX validation Disposable detection Role accounts
Add to your signup form
<script src="https://check.verifyswift.com/"></script>
One line · No registration · See full docs & demo → · Customize →

MX Hostnames

  • mx02.hornetsecurity.com
  • mx04.hornetsecurity.com
  • mx01.hornetsecurity.com
  • mx03.hornetsecurity.com

MX Priorities

  • mx02.hornetsecurity.com: 20
  • mx01.hornetsecurity.com: 10
  • mx04.hornetsecurity.com: 200
  • mx03.hornetsecurity.com: 200

A / AAAA Records

  • 49.12.204.92 ↩ hz-nbg1-cloud-routing-001.mxp.services
  • 2a01:4f8:1c1e:b57a::1 ↩ hz-nbg1-cloud-routing-001.mxp.services

Mail Server IPs

  • 94.100.136.8 ↩ mx02.hornetsecurity.com
  • 94.100.132.8 ↩ mx01.hornetsecurity.com
  • 94.100.136.7 ↩ mx04.hornetsecurity.com
  • 94.100.134.8 ↩ mx03.hornetsecurity.com

SOA Record

Raw SOA shades05.rzone.de hostmaster.strato-rz.de 2020050744 86400 7200 604800 300
Primary NS (mname)
shades05.rzone.de
Admin Email (rname)
hostmaster@strato-rz.de
Serial
2020050744
Refresh
86400s
Retry
7200s
Expire
604800s
Minimum TTL
300s

Nameservers (NS)

docks14.rzone.de
shades05.rzone.de

SPF Record

✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:spf.hornetsecurity.com -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]; pct=100
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]

DKIM Selectors

✓ 2 found
selector1._domainkey
selector2._domainkey
✓ DKIM properly configured for selector: selector1

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

All TXT Records

1 record
  • SPFv=spf1 include:spf.protection.outlook.com include:spf.hornetsecurity.com -all
Free · No signup required
Add email validation to your forms

Block disposable emails, validate MX records, detect role accounts — unlimited, forever free.

<script src="https://check.verifyswift.com/"></script>
One line of code · Works on any site · Customize →
See demo & docs
Deep verification
Full email verification for rfk-immobilienverwaltung.de

SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.

No credit card required
Get 1,000 Free Credits