Domain Overview
DNS: ✓ 3h ago
Checker: ✓ 3h ago
nubexx.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-09-23 07:10:07 UTC · ↺ Refresh
MX Hostnames
- mail.nubexx.com
MX Priorities
- mail.nubexx.com: 10
A / AAAA Records
- 94.130.11.221 ↩ mail.nx-alpha.nubexx.com
Mail Server IPs
- 94.130.11.221 ↩ mail.nx-alpha.nubexx.com
SOA Record
Raw SOA
nsa2.schlundtech.de hostmaster.nubexx.com 2025102325 43200 7200 1209600 600
Primary NS (mname)
nsa2.schlundtech.de
Admin Email (rname)
hostmaster@nubexx.com
Serial
2025102325
Refresh
43200s
Retry
7200s
Expire
1209600s
Minimum TTL
600s
Nameservers (NS)
nsb2.schlundtech.de
nsc2.schlundtech.de
nsa2.schlundtech.de
nsd2.schlundtech.de
SPF Record
✓ Strict (-all)
v=spf1 mx a -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1;p=reject;rua=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 1 found
dkim._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: dkim
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
3 records- SPFv=spf1 mx a -all
- zone-ownership-verification-78d8feb2966ec491d1782d975a34a7e5d3980ae49775051efe35a1499c0bcb59
- google-site-verification=EqabFdz8P0GJGgrZRRCUeZYRnxKPLSexC-hiYSERyEA
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 nubexx.com
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits