Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
idat.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-04-02 03:10:35 UTC · ↺ Refresh
MX Hostnames
- mail2.cst-systemhaus.de
MX Priorities
- mail2.cst-systemhaus.de: 10
A / AAAA Records
- 198.202.211.1 (no PTR)
Mail Server IPs
- 136.243.22.75 ↩ mail2.cst-systemhaus.de
SOA Record
Raw SOA
ns.cst-systemhaus.de info.cst-it.de 2026030501 14400 1800 604800 86400
Primary NS (mname)
ns.cst-systemhaus.de
Admin Email (rname)
info@cst-it.de
Serial
2026030501
Refresh
14400s
Retry
1800s
Expire
604800s
Minimum TTL
86400s
Nameservers (NS)
robotns2.second-ns.de
ns.ddt-consult.de
ns.cst-systemhaus.de
SPF Record
✓ Strict (-all)
v=spf1 include:spf.clustermail.de include:spf.protection.outlook.com a:mail2.cst-systemhaus.de -all
📊 DNS lookups: 3/10
✓ 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
✗ None detectedNo DKIM records found for common selectors — your provider may use a custom selector name.
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
4 records- SPFv=spf1 include:spf.clustermail.de include:spf.protection.outlook.com a:mail2.cst-systemhaus.de -all
- MS=ms60533922
- MS=BBB5ED8D10FF9D63EC455EEED1EA25562F6AB068
- google-site-verification=avuKRFv37y7C59zyO67jFTjCeAQ6iwb9ztfh32yOdRE
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