Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
premiumclass.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-17 19:25:54 UTC · ↺ Refresh
MX Hostnames
- mail.cco.de
MX Priorities
- mail.cco.de: 10
A / AAAA Records
- 162.55.67.122 ↩ static.122.67.55.162.clients.your-server.de
Mail Server IPs
- 159.69.221.51 ↩ mail.cco.de
SOA Record
Raw SOA
ns1.nicns.net ceo.premiumclass.de 1721213292 14400 1800 1209600 3600
Primary NS (mname)
ns1.nicns.net
Admin Email (rname)
ceo@premiumclass.de
Serial
1721213292
Refresh
14400s
Retry
1800s
Expire
1209600s
Minimum TTL
3600s
Nameservers (NS)
ns1.nicns.net
ns3.nicns.net
ns2.nicns.net
SPF Record
✓ Strict (-all)
v=spf1 mx a:mail.cco.de -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected]; adkim=s; aspf=s
✓ Reject — strongest protection
📋 SPF alignment: Strict
· DKIM alignment: Strict
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 13 found
google._domainkey
selector1._domainkey
selector2._domainkey
default._domainkey
mail._domainkey
dkim._domainkey
k1._domainkey
s1._domainkey
s2._domainkey
zoho._domainkey
sendgrid._domainkey
mxvault._domainkey
amazonses._domainkey
⚠ Public key (p=) missing in DKIM record for selector google.
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
1 record- SPFv=spf1 mx a:mail.cco.de -all
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