Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
preprobau.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-19 22:32:00 UTC · ↺ Refresh
MX Hostnames
- mx.webcoding24.com
MX Priorities
- mx.webcoding24.com: 10
A / AAAA Records
- 217.160.0.198 ↩ 217-160-0-198.elastic-ssl.ui-r.com
- 2001:8d8:100f:f000::200 ↩ 2001-08d8-100f-f000-0000-0000-0000-0200.elastic-ssl.ui-r.com
Mail Server IPs
- 89.58.44.171 ↩ mx.webcoding24.com
SOA Record
Raw SOA
ns1025.ui-dns.org hostmaster.1und1.com 2017060159 28800 7200 604800 600
Primary NS (mname)
ns1025.ui-dns.org
Admin Email (rname)
hostmaster@1und1.com
Serial
2017060159
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
600s
Nameservers (NS)
ns1025.ui-dns.org
ns1047.ui-dns.de
ns1093.ui-dns.com
ns1111.ui-dns.biz
SPF Record
✓ Strict (-all)
v=spf1 ip4:37.120.170.177 -all
📊 DNS lookups: 0/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ MissingNo DMARC record — emails cannot be rejected on auth failure.
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
1 record- SPFv=spf1 ip4:37.120.170.177 -all
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 preprobau.de
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits