Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
otto-theobald.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-02 10:10:39 UTC · ↺ Refresh
MX Hostnames
- mail2020.otto-theobald.de
MX Priorities
- mail2020.otto-theobald.de: 10
A / AAAA Records
- 85.220.128.99 ↩ mail.otto-theobald.de
Mail Server IPs
- 85.220.128.101 ↩ mail2020.otto-theobald.de
SOA Record
Raw SOA
a.ns14.net hostmaster.internetx.de 2025101601 10000 7200 604800 300
Primary NS (mname)
a.ns14.net
Admin Email (rname)
hostmaster@internetx.de
Serial
2025101601
Refresh
10000s
Retry
7200s
Expire
604800s
Minimum TTL
300s
Nameservers (NS)
c.ns14.net
b.ns14.net
a.ns14.net
d.ns14.net
SPF Record
✓ Strict (-all)
v=spf1 mx include:spf.nl2go.com -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1;p=quarantine;pct=100;rua=mailto:[email protected];ruf=mailto:[email protected];adkim=r;aspf=r
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
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=01cju6Z__gzKTJ54NXxyCGcEX9NxdNCN3vATWUwZYis
- SPFv=spf1 mx include:spf.nl2go.com -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
See demo & docs
Deep verification
Full email verification for otto-theobald.de
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits