Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
kontorkoeln.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-03 04:48:28 UTC · ↺ Refresh
MX Hostnames
- mail.kontorkoeln.de
MX Priorities
- mail.kontorkoeln.de: 10
A / AAAA Records
- 46.38.233.101 ↩ mail.kontorkoeln.de
Mail Server IPs
- 46.38.233.101 ↩ mail.kontorkoeln.de
SOA Record
Raw SOA
root-dns.netcup.net dnsadmin.netcup.net 2025042102 28800 7200 1209600 300
Primary NS (mname)
root-dns.netcup.net
Admin Email (rname)
dnsadmin@netcup.net
Serial
2025042102
Refresh
28800s
Retry
7200s
Expire
1209600s
Minimum TTL
300s
Nameservers (NS)
root-dns.netcup.net
second-dns.netcup.net
third-dns.netcup.net
SPF Record
✗ MissingNo SPF record — domain is unprotected against spoofing.
⚠ No SPF record found. Email servers cannot verify authorized senders.
DMARC Record
✗ p=none
v=DMARC1; p=none
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
DKIM Selectors
✓ 1 found
default._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: default
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
1 record- 46.38.233.101
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 kontorkoeln.de
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits