Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
naturschutzzentrum-karlshagen.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-02 04:53:45 UTC · ↺ Refresh
MX Hostnames
- mail.naturschutzzentrum-karlshagen.de
MX Priorities
- mail.naturschutzzentrum-karlshagen.de: 10
A / AAAA Records
- 157.90.18.165 ↩ cs487.fc-server.net
Mail Server IPs
- 157.90.18.165 ↩ cs487.fc-server.net
SOA Record
Raw SOA
dns.dns1.de hostmaster.internetwire.de 2022101103 28800 7200 604800 86400
Primary NS (mname)
dns.dns1.de
Admin Email (rname)
hostmaster@internetwire.de
Serial
2022101103
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
86400s
Nameservers (NS)
dns.dns3.de
dns.dns1.de
dns.dns4.de
dns.dns2.de
SPF Record
✓ Strict (-all)
v=spf1 a mx include:fc-server.eu -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; sp=reject
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
↳ Subdomain policy: reject
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 a mx include:fc-server.eu -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 · Customize →
See demo & docs
Deep verification
Full email verification for naturschutzzentrum-karlshagen.de
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits