3plus.de

Valid Email Server
Domain Lookup › 3plus.de

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
3plus.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-03-30 02:36:57 UTC · ↺ Refresh

MX Hostnames

  • mail.3plus.de

MX Priorities

  • mail.3plus.de: 10

A / AAAA Records

  • 85.13.137.243 ↩ dd17122.kasserver.com

Mail Server IPs

  • 87.79.92.45 ↩ static-87-79-92-45.netcologne.de

SOA Record

Raw SOA ns5.kasserver.com hostmaster.kasserver.com 2511281420 28800 7200 1209600 7200
Primary NS (mname)
ns5.kasserver.com
Admin Email (rname)
hostmaster@kasserver.com
Serial
2511281420
Refresh
28800s
Retry
7200s
Expire
1209600s
Minimum TTL
7200s

Nameservers (NS)

a-dns-service.de
ns5.kasserver.com
ns3.kas-dns-server.de
ns6.kasserver.com

SPF Record

✓ Strict (-all)
v=spf1 a mx include:netcologne.de -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected]; ruf=mailto:[email protected]; sp=reject; aspf=r; adkim=r
✓ Reject — strongest protection
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: reject

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 a mx include:netcologne.de -all
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