Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
katharinengymnasium.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-22 08:11:08 UTC · ↺ Refresh
MX Hostnames
- 78.46.179.2
MX Priorities
- 78.46.179.2: 10
A / AAAA Records
- 148.251.188.41 ↩ ax02.rtfnt.com
Mail Server IPs
- 78.46.179.2 ↩ www359.your-server.de
- ::ffff:4e2e:b302 ↩ www359.your-server.de
SOA Record
Raw SOA
ns1.first-ns.de dns.hetzner.com 2026012700 14400 1800 604800 60
Primary NS (mname)
ns1.first-ns.de
Admin Email (rname)
dns@hetzner.com
Serial
2026012700
Refresh
14400s
Retry
1800s
Expire
604800s
Minimum TTL
60s
Nameservers (NS)
robotns3.second-ns.com
ns1.first-ns.de
robotns2.second-ns.de
SPF Record
✓ Strict (-all)
v=spf1 include:_spf.google.com include:_spf.rtfnt.com -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1;p=none;rua=mailto:[email protected]
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
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
2 records- MS=3A8966C289427DAE9DEBC083638F68A8308DAEA5
- SPFv=spf1 include:_spf.google.com include:_spf.rtfnt.com -all
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