Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
gropiusbau.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-29 08:17:08 UTC · ↺ Refresh
MX Hostnames
- mailgate.kbb.eu
MX Priorities
- mailgate.kbb.eu: 10
A / AAAA Records
- 212.36.170.234 (no PTR)
Mail Server IPs
- 81.88.32.245 ↩ mailgate.kbb.eu
SOA Record
Raw SOA
ns2.knipp.de dnsmaster.irondns.net 2024042253 10800 3000 2419200 900
Primary NS (mname)
ns2.knipp.de
Admin Email (rname)
dnsmaster@irondns.net
Serial
2024042253
Refresh
10800s
Retry
3000s
Expire
2419200s
Minimum TTL
900s
Nameservers (NS)
ns17.knipp.net
ns3.knipp.de
ns2.knipp.de
SPF Record
✓ Soft Fail (~all)
v=spf1 mx ip4:81.88.32.245 a:web0.visitate.net a:web1.visitate.net include:spf.protection.outlook.de ~all
📊 DNS lookups: 4/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=0; aspf=s
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Strict
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 1 found
mail._domainkey
✓ Public key: 392 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
2 records- SPFv=spf1 mx ip4:81.88.32.245 a:web0.visitate.net a:web1.visitate.net include:spf.protection.outlook.de ~all
- MS=ms33156932
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 gropiusbau.de
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits