Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
3a-halle.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-21 22:05:20 UTC · ↺ Refresh
MX Hostnames
- mx2.onoffice.de
- mx3.onoffice.de
- mx1.onoffice.de
MX Priorities
- mx3.onoffice.de: 20
- mx2.onoffice.de: 10
- mx1.onoffice.de: 10
A / AAAA Records
- 217.160.0.38 ↩ 217-160-0-38.elastic-ssl.ui-r.com
- 2001:8d8:100f:f000::263 ↩ 2001-08d8-100f-f000-0000-0000-0000-0263.elastic-ssl.ui-r.com
Mail Server IPs
- 95.130.253.56 ↩ mx3.onoffice.de
- 95.130.253.71 ↩ mx2.onoffice.de
- 95.130.253.60 ↩ mx1.onoffice.de
SOA Record
Raw SOA
ns.udag.de hostmaster.united-domains.de 2024112763 10800 3600 604800 3600
Primary NS (mname)
ns.udag.de
Admin Email (rname)
hostmaster@united-domains.de
Serial
2024112763
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
ns.udag.net
ns.udag.de
ns.udag.org
SPF Record
✓ Soft Fail (~all)
v=spf1 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
2 records- SPFv=spf1 include:_spf.onoffice.de ~all
- google-site-verification=9Cuf3u5vDzECMOOr9KX4l5YzJ4y8COzsLi6HbSvUoLg
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 3a-halle.de
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits