Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
historikerin.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-31 20:44:11 UTC · ↺ Refresh
MX Hostnames
- mail.cryptix.net
MX Priorities
- mail.cryptix.net: 5
A / AAAA Records
- 83.137.101.105 ↩ www.cryptix.de
- 2001:470:6d:6b::105 (no PTR)
Mail Server IPs
- 83.137.101.104 ↩ mail.cryptix.net
- 2001:470:6d:6b::104 ↩ mail.cryptix.net
SOA Record
Raw SOA
ns1.cryptix.net root.cryptix.de 2021101001 10800 7200 604800 10800
Primary NS (mname)
ns1.cryptix.net
Admin Email (rname)
root@cryptix.de
Serial
2021101001
Refresh
10800s
Retry
7200s
Expire
604800s
Minimum TTL
10800s
Nameservers (NS)
ns3.cryptix.net
ns1.cryptix.net
SPF Record
✓ Strict (-all)
v=spf1 mx a ip4:83.137.101.103 ip6:2001:470:6d:eb9::103 ip4:83.137.101.104 ip6:2001:470:6d:6b::104 -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ MissingNo DMARC record — emails cannot be rejected on auth failure.
DKIM Selectors
✓ 1 found
mail._domainkey
✓ Public key: 392 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
1 record- SPFv=spf1 mx a ip4:83.137.101.103 ip6:2001:470:6d:eb9::103 ip4:83.137.101.104 ip6:2001:470:6d:6b::104 -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 historikerin.de
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits