columbus-clean.com

Valid Email Server
Domain Lookup › columbus-clean.com

Domain Overview

DNS: ✓ 2d ago Checker: ✓ 2d ago
columbus-clean.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-05-19 04:28:31 UTC · ↺ Refresh

MX Hostnames

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

MX Priorities

  • mx01.hornetsecurity.com: 10
  • mx04.hornetsecurity.com: 40
  • mx03.hornetsecurity.com: 30
  • mx02.hornetsecurity.com: 20

A / AAAA Records

  • 85.220.229.66 ↩ vweb319.mk.de

Mail Server IPs

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

SOA Record

Raw SOA ns1.mk.de hostmaster.mk.de 2021071457 10800 3600 604800 300
Primary NS (mname)
ns1.mk.de
Admin Email (rname)
hostmaster@mk.de
Serial
2021071457
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
300s

Nameservers (NS)

ns2.mk.de
ns1.mk.de

SPF Record

✓ Strict (-all)
v=spf1 a a:cloud7-vm306.de-nserver.de a:vweb319.mk.de ip4:82.100.208.56/29 ip4:82.100.195.232/29 include:_spf.mk.de include:spf.hornetsecurity.com include:_spf_eucentral1.prod.hydra.sophos.com -all
📊 DNS lookups: 6/10
✓ 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

4 records
  • SPFv=spf1 a a:cloud7-vm306.de-nserver.de a:vweb319.mk.de ip4:82.100.208.56/29 ip4:82.100.195.232/29 include:_spf.mk.de include:spf.hornetsecurity.com include:_spf_eucentral1.prod.hydra.sophos.com -all
  • sophos-domain-verification=81f41f9f8bbac8e180a815cc39533b380b633b7c
  • MS=ms82650438
  • sophos-domain-verification=9bae9e68f3dc97c8cde3bddc59b228c365febf5109f4081f83d6cc9ad19c0911
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
See demo & docs
Deep verification
Full email verification for columbus-clean.com

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

No credit card required
Get 1,000 Free Credits