Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
oliver-klenz.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-24 08:29:19 UTC · ↺ Refresh
MX Hostnames
- mx1.onoffice.de
- mx2.onoffice.de
MX Priorities
- mx2.onoffice.de: 20
- mx1.onoffice.de: 10
A / AAAA Records
- 136.243.160.20 ↩ dedi4734.your-server.de
- 2a01:4f8:d0a:62df::2 ↩ dedi4734.your-server.de
Mail Server IPs
- 95.130.253.71 ↩ mx2.onoffice.de
- 95.130.253.60 ↩ mx1.onoffice.de
SOA Record
Raw SOA
ns1.your-server.de postmaster.your-server.de 2026011300 86400 10800 3600000 7200
Primary NS (mname)
ns1.your-server.de
Admin Email (rname)
postmaster@your-server.de
Serial
2026011300
Refresh
86400s
Retry
10800s
Expire
3600000s
Minimum TTL
7200s
Nameservers (NS)
ns3.second-ns.de
ns.second-ns.com
ns1.your-server.de
SPF Record
✓ Soft Fail (~all)
v=spf1 include:_spf.onoffice.de +a +mx ~all
📊 DNS lookups: 3/10
~ Soft fail (~all) — moderate enforcement
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
2 records- google-site-verification=IyCV9u45ucOSkBW2vFW55FgE_ecT8jo7VrdzKFiBpK8
- SPFv=spf1 include:_spf.onoffice.de +a +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 · Customize →
See demo & docs
Deep verification
Full email verification for oliver-klenz.de
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits