Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
colibri-frankfurt.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-21 18:10:22 UTC · ↺ Refresh
MX Hostnames
- mx331.ssd-webhosting.de
MX Priorities
- mx331.ssd-webhosting.de: 10
A / AAAA Records
- 79.133.45.235 (no PTR)
- 2a01:7e0::134:0:0:0:200e (no PTR)
Mail Server IPs
- 79.133.37.35 ↩ mx331.ssd-webhosting.de
- 2a01:7e0::134:0:0:0:2001 ↩ mx331.ssd-webhosting.de
SOA Record
Raw SOA
ns1.nextdns.eu info.colibri-frankfurt.de 2026022202 10800 3600 604800 10800
Primary NS (mname)
ns1.nextdns.eu
Admin Email (rname)
info@colibri-frankfurt.de
Serial
2026022202
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
10800s
Nameservers (NS)
ns1.nextdns.eu
ns3.nextdns.eu
ns2.nextdns.eu
SPF Record
✓ Strict (-all)
v=spf1 +a +mx -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ MissingNo DMARC record — emails cannot be rejected on auth failure.
DKIM Selectors
✓ 1 found
default._domainkey
✓ Public key: 392 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- google-site-verification=lgB_dGl9JNrm--E-iZKB1NWJsJN-eD7jf5_8S-j1Xo4
- SPFv=spf1 +a +mx -all
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