Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
katharina.fit
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-26 03:41:24 UTC · ↺ Refresh
MX Hostnames
- mx2ff9.netcup.net
- mail.katharina.fit
MX Priorities
- mx2ff9.netcup.net: 50
- mail.katharina.fit: 10
A / AAAA Records
- 188.68.47.247 ↩ a2ff7.netcup.net
- 2a03:4000:30:6cf5::12:7996 (no PTR)
Mail Server IPs
- 188.68.47.249 ↩ mx2ff9.netcup.net
- 2a03:4000::37a:e427:f3ff:feb2:6207 ↩ mx2ff9.netcup.net
SOA Record
Raw SOA
root-dns.netcup.net dnsadmin.netcup.net 2024021528 28800 7200 1209600 86400
Primary NS (mname)
root-dns.netcup.net
Admin Email (rname)
dnsadmin@netcup.net
Serial
2024021528
Refresh
28800s
Retry
7200s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
root-dns.netcup.net
second-dns.netcup.net
third-dns.netcup.net
SPF Record
✓ Soft Fail (~all)
v=spf1 mx a include:_spf.webhosting.systems ~all
📊 DNS lookups: 3/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected]
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
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
3 records- SPFv=spf1 mx a include:_spf.webhosting.systems ~all
- brevo-code:f241c5b16038ccab03bdcf13fd5dc236
- google-site-verification=SVy2qpYNotKGZ5ja37NPNv3YwwsRDmY5e15yZqgTQgw
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 katharina.fit
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits