Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
leibniz-gei.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-02 19:35:28 UTC · ↺ Refresh
MX Hostnames
- c2781.mx.srv.dfn.de
- a2781.mx.srv.dfn.de
- b2781.mx.srv.dfn.de
MX Priorities
- c2781.mx.srv.dfn.de: 10
- a2781.mx.srv.dfn.de: 10
- b2781.mx.srv.dfn.de: 10
A / AAAA Records
- 193.175.255.92 ↩ web-varnish.gei.de
Mail Server IPs
- 194.95.239.55 ↩ c2781.mx.srv.dfn.de
- 194.95.233.55 ↩ a2781.mx.srv.dfn.de
- 194.95.235.55 ↩ b2781.mx.srv.dfn.de
SOA Record
Raw SOA
ns73.domaincontrol.com dns.jomax.net 2024021400 28800 7200 604800 600
Primary NS (mname)
ns73.domaincontrol.com
Admin Email (rname)
dns@jomax.net
Serial
2024021400
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
600s
Nameservers (NS)
ns74.domaincontrol.com
ns73.domaincontrol.com
SPF Record
✓ Soft Fail (~all)
v=spf1 a mx a:extern1.gei.de a:mailer.gbv.de a:mail.tu-braunschweig.de a:bibservices.biblio.etc.tu-bs.de ~all
📊 DNS lookups: 6/10
~ 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
1 record- SPFv=spf1 a mx a:extern1.gei.de a:mailer.gbv.de a:mail.tu-braunschweig.de a:bibservices.biblio.etc.tu-bs.de ~all
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