Domain Overview
DNS: ✓ 1d ago
Checker: ✓ 1d ago
ibw-ruehrer.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-07-18 03:28:08 UTC · ↺ Refresh
MX Hostnames
- mail.ibw-ruehrer.de
MX Priorities
- mail.ibw-ruehrer.de: 10
A / AAAA Records
- 78.46.9.135 ↩ dedi1635.your-server.de
Mail Server IPs
- 87.128.17.29 ↩ mail.ibw-ruehrer.de
SOA Record
Raw SOA
ns1.sdv-werbestudio.de it.sdv-werbestudio.de 2024072900 43200 7200 1209600 600
Primary NS (mname)
ns1.sdv-werbestudio.de
Admin Email (rname)
it@sdv-werbestudio.de
Serial
2024072900
Refresh
43200s
Retry
7200s
Expire
1209600s
Minimum TTL
600s
Nameservers (NS)
ns2.sdv-werbestudio.de
ns1.sdv-werbestudio.de
ns3.sdv-werbestudio.de
ns4.sdv-werbestudio.de
SPF Record
✓ Strict (-all)
v=spf1 mx a:mail.ibw-ruehrer.de ip4:87.128.17.29 ip4:78.46.9.135 -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1;p=none;sp=quarantine;pct=100;rua=mailto:[email protected];ruf=mailto:[email protected];ri=86400;aspf=r;adkim=r;fo=1;
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: quarantine
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
2 records- SPFv=spf1 mx a:mail.ibw-ruehrer.de ip4:87.128.17.29 ip4:78.46.9.135 -all
- brevo-code:b49c8805f939d7dcf7a8c61bd2406650
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 ibw-ruehrer.de
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits