Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
diehl-defence.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-31 10:05:11 UTC · ↺ Refresh
MX Hostnames
- mail1.diehl-defence.de
- mail2.diehl-defence.de
MX Priorities
- mail1.diehl-defence.de: 2
- mail2.diehl-defence.de: 2
A / AAAA Records
- 193.201.238.43 (no PTR)
Mail Server IPs
- 194.45.48.217 ↩ mail1.diehl-defence.de
- 194.45.48.218 ↩ mail2.diehl-defence.de
SOA Record
Raw SOA
ns1.sedat.de domadm.sedat.de 2025061601 600 7200 604800 86400
Primary NS (mname)
ns1.sedat.de
Admin Email (rname)
domadm@sedat.de
Serial
2025061601
Refresh
600s
Retry
7200s
Expire
604800s
Minimum TTL
86400s
Nameservers (NS)
ns2.key-systems.net
ns3.sedat.de
ns2.sedat.de
SPF Record
✓ Strict (-all)
v=spf1 mx -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine ; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=0:1; pct=100
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 1 found
s1._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: s1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
1 record- SPFv=spf1 mx -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 diehl-defence.de
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits