karls.de

Valid Email Server

Domain Overview

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

Checked via [email protected] · 2026-03-19 18:50:20 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

  • karls-de.mail.protection.outlook.com

MX Priorities

  • karls-de.mail.protection.outlook.com: 10

A / AAAA Records

  • 92.51.146.219 ↩ lvps92-51-146-219.dedicated.hosteurope.de

Mail Server IPs

  • 52.101.68.12 ↩ mail-db9pr02cu00204.inbound.protection.outlook.com
  • 52.101.68.16 ↩ mail-db4pr02cu00400.inbound.protection.outlook.com
  • 52.101.73.11 ↩ mail-am1pr04cu00103.inbound.protection.outlook.com
  • 52.101.73.12 ↩ mail-am4pr0401cu00104.inbound.protection.outlook.com
  • 2a01:111:f403:ca09::f ↩ mail-am7pr05cu00307.inbound.protection.outlook.com
  • 2a01:111:f403:ca09:: ↩ mail-am3pr04cu00500.inbound.protection.outlook.com
  • 2a01:111:f403:ca09::d ↩ mail-as9pr05cu01305.inbound.protection.outlook.com
  • 2a01:111:f403:ca09::e ↩ mail-am7pr05cu00206.inbound.protection.outlook.com

SOA Record

Raw SOA ns1071.ui-dns.de hostmaster.1und1.de 2017073376 28800 7200 604800 300
Primary NS (mname)
ns1071.ui-dns.de
Admin Email (rname)
hostmaster@1und1.de
Serial
2017073376
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
300s

Nameservers (NS)

ns1071.ui-dns.de
ns1071.ui-dns.com
ns1071.ui-dns.org
ns1071.ui-dns.biz

SPF Record

✓ Strict (-all)
v=spf1 mx ip4:176.9.11.254 ip4:92.51.146.219 include:mailgun.org include:spf.protection.outlook.com include:spf.academymaker.de -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected],mailto:[email protected]; ri=86400; fo=1; pct=100
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected],mailto:[email protected]

DKIM Selectors

✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: selector1

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

All TXT Records

12 records
  • klaviyo-site-verification=VcBJvy
  • atlassian-domain-verification=aLHVbtSJID4654ONmL19PPOH3MNwLu6GNyNiuowM8GJ3xLxP869h/CHXzfQ/kU8u
  • MS=AC5C2D708B7B9AB8E8792A13A94A68610987F965
  • apple-domain-verification=h0QsODz7pg6ojnSO
  • SPFv=spf1 mx ip4:176.9.11.254 ip4:92.51.146.219 include:mailgun.org include:spf.protection.outlook.com include:spf.academymaker.de -all
  • google-site-verification=eHTJ-PcNn6fm-TAfbDLoLq_hDCsDMsSKsHjBTYPuF0Y
  • 518566f31a312600e4522c22e51980c7e1cc6d9782551c7f7b75a2eed90814a
  • _globalsign-domain-verification=m9vTUBr6N31WiswFqb6LYOM1zIilmD6UykXKo0coEu
  • google-site-verification=EJCT1s2lnbThlAh0X2n6bNTI3Esrv13MmNuglEyfCzw
  • google-site-verification=ggnhhQYm2DnCsnJ5pA71xaUlpXY1MvteR8bDjPkGka8
  • google-site-verification=KmnWCjdfqw2TOVB2nIjmpLg_NjGBFQ85VwyWRVxI86s
  • google-site-verification=_0q2-qtmxSf9-ZhEBunwzaSP5hkg5qw6T6CYKfWtRNg
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 karls.de

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

No credit card required
Get 1,000 Free Credits