Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
arena-chieftec.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-31 03:43:31 UTC · ↺ Refresh
MX Hostnames
- smtp.coltintermail.com
MX Priorities
- smtp.coltintermail.com: 10
A / AAAA Records
- 213.61.2.20 ↩ dslkunden-03.fra.de.colt-isc.net
Mail Server IPs
- 64.29.145.201 ↩ mx1.colthosting.net
SOA Record
Raw SOA
ns0.de.colt.net hostmaster.de.colt.net 2005070400 39940 14400 604800 43200
Primary NS (mname)
ns0.de.colt.net
Admin Email (rname)
hostmaster@de.colt.net
Serial
2005070400
Refresh
39940s
Retry
14400s
Expire
604800s
Minimum TTL
43200s
Nameservers (NS)
ns0.de.colt.net
ns8.colt.net
SPF Record
✗ MissingNo SPF record — domain is unprotected against spoofing.
⚠ No SPF record found. Email servers cannot verify authorized senders.
DMARC Record
✗ MissingNo DMARC record — emails cannot be rejected on auth failure.
DKIM Selectors
✗ None detectedNo DKIM records found for common selectors — your provider may use a custom selector name.
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
No TXT records found.
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 arena-chieftec.de
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits