Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
kolesnyk.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-31 00:59:29 UTC · ↺ Refresh
MX Hostnames
- mail.red-baron.de
MX Priorities
- mail.red-baron.de: 20
A / AAAA Records
- 83.169.0.174 ↩ mail.red-baron.de
Mail Server IPs
- 83.169.0.174 ↩ mail.red-baron.de
SOA Record
Raw SOA
x.ns.joker.com hostmaster.joker.com 2025092357 14400 3600 1209600 300
Primary NS (mname)
x.ns.joker.com
Admin Email (rname)
hostmaster@joker.com
Serial
2025092357
Refresh
14400s
Retry
3600s
Expire
1209600s
Minimum TTL
300s
Nameservers (NS)
y.ns.joker.com
x.ns.joker.com
z.ns.joker.com
SPF Record
✓ Strict (-all)
v=spf1 ip4:83.169.0.174 ip6:2a01:488:66:1000:53a9:ae:0:1 a:mail.red-baron.de -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ MissingNo DMARC record — emails cannot be rejected on auth failure.
DKIM Selectors
✗ None detectedNo DKIM records found for common selectors — your provider may use a custom selector name.
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
1 record- SPFv=spf1 ip4:83.169.0.174 ip6:2a01:488:66:1000:53a9:ae:0:1 a:mail.red-baron.de -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 kolesnyk.de
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits