Domain Overview
DNS: ✓ 3d ago
Checker: ✓ 3d ago
zmt-bremen.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-05-17 23:47:14 UTC · ↺ Refresh
MX Hostnames
- mx.leibniz-zmt.de
MX Priorities
- mx.leibniz-zmt.de: 10
A / AAAA Records
No A/AAAA records found.
Mail Server IPs
- 194.95.13.133 ↩ mx.leibniz-zmt.de
SOA Record
Raw SOA
deneb.dfn.de hostmaster.dfn.de 2025021700 14400 7200 3024000 3600
Primary NS (mname)
deneb.dfn.de
Admin Email (rname)
hostmaster@dfn.de
Serial
2025021700
Refresh
14400s
Retry
7200s
Expire
3024000s
Minimum TTL
3600s
Nameservers (NS)
dns-1.dfn.de
dns-2.dfn.de
dns-3.dfn.de
SPF Record
✓ Strict (-all)
v=spf1 a mx -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict 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 a mx -all
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