Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
iwn.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-30 17:02:49 UTC · ↺ Refresh
MX Hostnames
- mx-02-eu-central-1.prod.hydra.sophos.com
- mx-01-eu-central-1.prod.hydra.sophos.com
MX Priorities
- mx-02-eu-central-1.prod.hydra.sophos.com: 20
- mx-01-eu-central-1.prod.hydra.sophos.com: 10
A / AAAA Records
- 93.90.206.163 ↩ host01.iok.net
Mail Server IPs
- 18.159.80.41 ↩ ec2-18-159-80-41.eu-central-1.compute.amazonaws.com
- 52.57.183.85 ↩ ec2-52-57-183-85.eu-central-1.compute.amazonaws.com
SOA Record
Raw SOA
ns02.iok.net server-providing.iok.net 2025092901 10800 3600 604800 10800
Primary NS (mname)
ns02.iok.net
Admin Email (rname)
server-providing@iok.net
Serial
2025092901
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
10800s
Nameservers (NS)
ns03.iok.net
ns04.iok.de
ns02.iok.net
ns01.iok.net
SPF Record
✓ Strict (-all)
v=spf1 include:_spf.prod.hydra.sophos.com a:irs01.iok.net a:host01.iok.net a:mail.iwn-armaturen.de a:mail05.iok.net a:mail04.iok.net -all
📊 DNS lookups: 6/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; pct=100; adkim=r; aspf=r
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
5 records- 697L+jjli2mPKz2A9CLx/IFrx/uvxIQo3TP4tNYOj53/0EOnXXZi9MetxH7pVFNJBIEXKKDvL30U8aqI4P1Riw==
- MS=ms21818146
- _ahpdl37v7z40y49p3qxl562qkpz1e83
- sophos-domain-verification=f77fa94e90d2e6b1a14f4edac0581ae7c86d09c6
- SPFv=spf1 include:_spf.prod.hydra.sophos.com a:irs01.iok.net a:host01.iok.net a:mail.iwn-armaturen.de a:mail05.iok.net a:mail04.iok.net -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 iwn.de
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits