Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
haeberle-lab.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-02 20:44:42 UTC · ↺ Refresh
MX Hostnames
- sf.albguard4mail.de
MX Priorities
- sf.albguard4mail.de: 10
A / AAAA Records
- 23.88.95.89 ↩ dedi7424.your-server.de
- 2a01:4f8:1061:1151::2 ↩ dedi7424.your-server.de
Mail Server IPs
- 217.7.63.44 ↩ sf.albguard4mail.de
SOA Record
Raw SOA
ns2.ctl.de hostmaster.ctl.de 2026032001 10800 3600 604800 86400
Primary NS (mname)
ns2.ctl.de
Admin Email (rname)
hostmaster@ctl.de
Serial
2026032001
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
86400s
Nameservers (NS)
b.ns14.net
ns2.ctl.de
c.ns14.net
d.ns14.net
SPF Record
✓ Strict (-all)
v=spf1 mx a a:odysseus.ctl.de a:owa.haeberle-lab.de ip4:213.206.182.104 a:mx1.wiessoft.de -all
📊 DNS lookups: 5/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 1 found
mail._domainkey
✓ Public key: 216 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
7 records- swisssign-check=TCNu-zyoOI6wI0gxmXIJiRWpbSQ
- SPFv=spf1 mx a a:odysseus.ctl.de a:owa.haeberle-lab.de ip4:213.206.182.104 a:mx1.wiessoft.de -all
- klaviyo-site-verification=RmH3uy
- zone-ownership-verification-8bc3948c784818688bd8455c5b19bd7569eba4c8c63161331d421ada522ea559
- swisssign-check=ySUJOCqKUx3GahF-9hAQBTjiang
- brevo-code:d5129747972a36f4fe6cda50cfecf0bf
- google-site-verification=b6VrqGZiiGD2oSi4-OyRLSW_Lqr-BOJs_etk31CoCmA
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 haeberle-lab.de
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits