Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
gz-alu.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-22 11:18:01 UTC · ↺ Refresh
MX Hostnames
- mx04.hornetsecurity.com
- mx01.hornetsecurity.com
- mx02.hornetsecurity.com
- mx03.hornetsecurity.com
MX Priorities
- mx02.hornetsecurity.com: 20
- mx03.hornetsecurity.com: 30
- mx04.hornetsecurity.com: 40
- mx01.hornetsecurity.com: 10
A / AAAA Records
- 92.205.23.163 ↩ 163.23.205.92.host.secureserver.net
Mail Server IPs
- 94.100.136.8 ↩ mx02.hornetsecurity.com
- 94.100.134.8 ↩ mx03.hornetsecurity.com
- 94.100.136.7 ↩ mx04.hornetsecurity.com
- 94.100.132.8 ↩ mx01.hornetsecurity.com
SOA Record
Raw SOA
ns1.ns-serve.net root.ns1.ns-serve.net 1759216674 10800 3600 604800 3600
Primary NS (mname)
ns1.ns-serve.net
Admin Email (rname)
root@ns1.ns-serve.net
Serial
1759216674
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
ns1.ns-serve.net
ns2.ns-serve.net
SPF Record
✓ Soft Fail (~all)
v=spf1 mx a:mail.gz-alu.de ip4:5.35.251.1 ip4:185.93.118.113 include:spf.clustermail.de include:spf.hornetsecurity.com ~all
📊 DNS lookups: 4/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none;
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
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
4 records- google-site-verification=36MilH4VtpoYHZNeKSythQClv5EBSY-BQ8px3Z9wUfs
- google-site-verification=X8rJHZiYThjtxeTv0lu5MMtvww5dLB7aqhGdR9qGVdE
- SPFv=spf1 mx a:mail.gz-alu.de ip4:5.35.251.1 ip4:185.93.118.113 include:spf.clustermail.de include:spf.hornetsecurity.com ~all
- 202202220109036cgzrod17zp4xtobfbhmh4scqtwsmg5vz9u8ecxkbcilyz4bx9
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 gz-alu.de
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits