Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
hahn-schickard.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-27 13:27:39 UTC · ↺ Refresh
MX Hostnames
- a2691.mx.srv.dfn.de
- b2691.mx.srv.dfn.de
- c2691.mx.srv.dfn.de
MX Priorities
- b2691.mx.srv.dfn.de: 10
- c2691.mx.srv.dfn.de: 10
- a2691.mx.srv.dfn.de: 10
A / AAAA Records
- 134.119.224.166 ↩ mc22151.ispgateway.de
- 2a00:116a:107:c540:: ↩ mc22151.ispgateway.de
Mail Server IPs
- 194.95.235.41 ↩ b2691.mx.srv.dfn.de
- 194.95.239.41 ↩ c2691.mx.srv.dfn.de
- 194.95.233.41 ↩ a2691.mx.srv.dfn.de
SOA Record
Raw SOA
hydrogen.ns.hetzner.com dns.hetzner.com 2026030303 86400 10800 3600000 3600
Primary NS (mname)
hydrogen.ns.hetzner.com
Admin Email (rname)
dns@hetzner.com
Serial
2026030303
Refresh
86400s
Retry
10800s
Expire
3600000s
Minimum TTL
3600s
Nameservers (NS)
oxygen.ns.hetzner.com
helium.ns.hetzner.de
hydrogen.ns.hetzner.com
SPF Record
✓ Strict (-all)
v=spf1 include:_spf.o269.mx.srv.dfn.de a:k37591.coveto.de mx:indivsurvey.de include:spf1.hahn-schickard.de -all
📊 DNS lookups: 5/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]; ruf=mailto:[email protected];
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 1 found
s1._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: s1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
2 records- SPFv=spf1 include:_spf.o269.mx.srv.dfn.de a:k37591.coveto.de mx:indivsurvey.de include:spf1.hahn-schickard.de -all
- 3hB0DeJi9IVoATw4l+8JVO0HeNJI8/hMGM3LDoqQsrsaq7B/BLVGUTjPggvNR8oD3Y2znxluJ4mVYofOUeOwPg==
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