Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
cduplus.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-03 05:51:34 UTC · ↺ Refresh
MX Hostnames
- mail48.cdu.de
MX Priorities
- mail48.cdu.de: 5
A / AAAA Records
- 193.219.105.56 (no PTR)
Mail Server IPs
- 193.219.105.48 ↩ mail48.cdu.de
SOA Record
Raw SOA
ns1.cdu.de root.ns1.cdu.de 2026031201 21000 1800 604800 3600
Primary NS (mname)
ns1.cdu.de
Admin Email (rname)
root@ns1.cdu.de
Serial
2026031201
Refresh
21000s
Retry
1800s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
secondary006.dtag.net
ns1.cdu.de
pns.dtag.de
SPF Record
✓ Strict (-all)
v=spf1 ip4:193.219.105.0/24 include:inxserver.com include:spf.protection.outlook.com -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected]!10m; ruf=mailto:[email protected]!10m; fo=1
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]!10m
DKIM Selectors
✓ 3 found
selector1._domainkey
selector2._domainkey
mail._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
2 records- SPFv=spf1 ip4:193.219.105.0/24 include:inxserver.com include:spf.protection.outlook.com -all
- MS=ms74532151
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