Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
cyllsteuerberater.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-22 05:57:55 UTC · ↺ Refresh
MX Hostnames
- mx02.hornetsecurity.com
- mx04.hornetsecurity.com
- mx01.hornetsecurity.com
- mx03.hornetsecurity.com
MX Priorities
- mx01.hornetsecurity.com: 20
- mx02.hornetsecurity.com: 200
- mx04.hornetsecurity.com: 20
- mx03.hornetsecurity.com: 200
A / AAAA Records
- 81.169.145.164 ↩ wa4.rzone.de
- 2a01:238:20a:202:1164:: ↩ wa4.rzone.de
Mail Server IPs
- 94.100.132.8 ↩ mx01.hornetsecurity.com
- 94.100.136.8 ↩ mx02.hornetsecurity.com
- 94.100.136.7 ↩ mx04.hornetsecurity.com
- 94.100.134.8 ↩ mx03.hornetsecurity.com
SOA Record
Raw SOA
shades02.rzone.de hostmaster.strato-rz.de 2020050836 86400 7200 604800 300
Primary NS (mname)
shades02.rzone.de
Admin Email (rname)
hostmaster@strato-rz.de
Serial
2020050836
Refresh
86400s
Retry
7200s
Expire
604800s
Minimum TTL
300s
Nameservers (NS)
docks14.rzone.de
shades02.rzone.de
SPF Record
✓ Strict (-all)
v=spf1 mx a ip4:217.91.31.76 include:spf.protection.outlook.de include:spf.hornetsecurity.com -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1;p=reject;
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
2 records- SPFv=spf1 mx a ip4:217.91.31.76 include:spf.protection.outlook.de include:spf.hornetsecurity.com -all
- google-site-verification=LUPM6R8bvuECK-lFrqR9rFLHzw3mB9JICGMWMbHxaZo
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 cyllsteuerberater.de
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits