Live data — DNS records and disposable check were just fetched and saved.
Domain Overview
DNS: ⚡ live
Checker: ⚡ live
informatik.uni-marburg.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-31 13:59:25 UTC · ↺ Refresh
MX Hostnames
- a2111.mx.srv.dfn.de
- b2111.mx.srv.dfn.de
- c2111.mx.srv.dfn.de
MX Priorities
- c2111.mx.srv.dfn.de: 10
- b2111.mx.srv.dfn.de: 10
- a2111.mx.srv.dfn.de: 10
A / AAAA Records
No A/AAAA records found.
Mail Server IPs
- 194.95.238.165 ↩ c2111.mx.srv.dfn.de
- 194.95.234.165 ↩ b2111.mx.srv.dfn.de
- 194.95.232.165 ↩ a2111.mx.srv.dfn.de
SOA Record
No SOA record found.
Nameservers (NS)
No nameservers found.
SPF Record
✓ Soft Fail (~all)
v=spf1 include:_spf.uni-marburg.de ip4:137.248.123.123 ~all
📊 DNS lookups: 1/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]; sp=quarantine; ri=86400
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: quarantine
DKIM Selectors
✓ 1 found
default._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: default
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
1 record- SPFv=spf1 include:_spf.uni-marburg.de ip4:137.248.123.123 ~all
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