Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
ur.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-20 00:23:28 UTC · ↺ Refresh
MX Hostnames
- c2561.mx.srv.dfn.de
- a2561.mx.srv.dfn.de
- b2561.mx.srv.dfn.de
MX Priorities
- b2561.mx.srv.dfn.de: 30
- c2561.mx.srv.dfn.de: 30
- a2561.mx.srv.dfn.de: 30
A / AAAA Records
- 194.94.156.251 ↩ wwwslb.uni-regensburg.de
Mail Server IPs
- 194.95.235.17 ↩ b2561.mx.srv.dfn.de
- 2001:638:d:c302:acdc:1979:2:c9 ↩ b2561.mx.srv.dfn.de
- 194.95.239.17 ↩ c2561.mx.srv.dfn.de
- 2001:638:d:c303:acdc:1979:2:c9 ↩ c2561.mx.srv.dfn.de
- 194.95.233.17 ↩ a2561.mx.srv.dfn.de
- 2001:638:d:c301:acdc:1979:2:c9 ↩ a2561.mx.srv.dfn.de
SOA Record
Raw SOA
dns1.uni-regensburg.de hostmaster.uni-regensburg.de 1773961200 14400 3600 604800 3600
Primary NS (mname)
dns1.uni-regensburg.de
Admin Email (rname)
hostmaster@uni-regensburg.de
Serial
1773961200
Refresh
14400s
Retry
3600s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
dns-3.dfn.de
dns1.uni-regensburg.de
dns2.uni-regensburg.de
SPF Record
✓ Strict (-all)
v=spf1 include:_spf.o256.mx.srv.dfn.de ip4:194.94.157.128/28 ip4:194.94.157.144/28 ip4:194.94.155.48/28 ip4:194.94.155.224/28 -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
2 records- SPFv=spf1 include:_spf.o256.mx.srv.dfn.de ip4:194.94.157.128/28 ip4:194.94.157.144/28 ip4:194.94.155.48/28 ip4:194.94.155.224/28 -all
- adobe-idp-site-verification=e57e4339da7d9d63f3f1191241f46e3be0b0028abdc13f8b80753d9cee14e754
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