lumberg.com

Valid Email Server
Domain Lookup › lumberg.com

Domain Overview

DNS: ✓ 9h ago Checker: ✓ 9h ago
lumberg.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-07-02 11:31:39 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

  • mail.lumberg.com
  • mail1.lumberg.com

MX Priorities

  • mail.lumberg.com: 20
  • mail1.lumberg.com: 10

A / AAAA Records

  • 185.91.6.5 (no PTR)

Mail Server IPs

  • 185.91.5.5 ↩ mail.lumberg.com
  • 2a03:8860:0:1::402 ↩ mail.lumberg.com
  • 185.91.4.4 ↩ mail1.lumberg.com
  • 2a03:8860:0:1::2 ↩ mail1.lumberg.com

SOA Record

Raw SOA pns.dtag.de dns.telekom.de 2025111400 10800 3600 2419200 3600
Primary NS (mname)
pns.dtag.de
Admin Email (rname)
dns@telekom.de
Serial
2025111400
Refresh
10800s
Retry
3600s
Expire
2419200s
Minimum TTL
3600s

Nameservers (NS)

pns.dtag.de
ns1.telekom.net

SPF Record

✓ Soft Fail (~all)
v=spf1 a:k62095.coveto.de include:spf.brevo.com include:spf.protection.outlook.com include:spf-de.emailsignatures365.com mx ~all
📊 DNS lookups: 5/10
~ Soft fail (~all) — moderate enforcement

DMARC Record

✗ p=none
v=DMARC1;p=none;pct=100;rua=mailto:[email protected];ruf=mailto:[email protected];sp=none;adkim=r;aspf=r
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: none

DKIM Selectors

✓ 1 found
mail._domainkey
✓ Public key: 736 chars (valid)
✓ DKIM properly configured for selector: mail

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

All TXT Records

4 records
  • sendinblue-code:f4a0a910b9c5784a492296335069291a
  • SPFv=spf1 a:k62095.coveto.de include:spf.brevo.com include:spf.protection.outlook.com include:spf-de.emailsignatures365.com mx ~all
  • MS=9E26219A0496688EBE3C30AE1B5955016ACFC8D8 google-site-verification=vWGx98xX1b7I2dmKZoMgCM2b2_2AJqNNMY3DWuprq40
  • google-site-verification=vWGx98xX1b7I2dmKZoMgCM2b2_2AJqNNMY3DWuprq40
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 lumberg.com

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

No credit card required
Get 1,000 Free Credits