Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
immobilien-schwarz-bonn.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-21 21:23:34 UTC · ↺ Refresh
MX Hostnames
- mx3.onoffice.de
- mx2.onoffice.de
- mx1.onoffice.de
MX Priorities
- mx2.onoffice.de: 10
- mx1.onoffice.de: 10
- mx3.onoffice.de: 20
A / AAAA Records
- 93.184.63.28 ↩ a00579.host.tro.net
Mail Server IPs
- 95.130.253.71 ↩ mx2.onoffice.de
- 95.130.253.60 ↩ mx1.onoffice.de
- 95.130.253.56 ↩ mx3.onoffice.de
SOA Record
Raw SOA
ns-a.tro.net hostmaster.tro.net 2025120200 43200 7200 1209600 86400
Primary NS (mname)
ns-a.tro.net
Admin Email (rname)
hostmaster@tro.net
Serial
2025120200
Refresh
43200s
Retry
7200s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns-d.tro.net
ns-b.tro.net
ns-a.tro.net
ns-c.tro.net
SPF Record
✓ Soft Fail (~all)
v=spf1 ip4:93.184.63.28/32 include:_spf.onoffice.de ~all
📊 DNS lookups: 1/10
~ 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
1 record- SPFv=spf1 ip4:93.184.63.28/32 include:_spf.onoffice.de ~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 immobilien-schwarz-bonn.de
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits