Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
sigma-ingenieure.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-21 18:31:45 UTC · ↺ Refresh
MX Hostnames
- mx.zeistserver.de
MX Priorities
- mx.zeistserver.de: 10
A / AAAA Records
No A/AAAA records found.
Mail Server IPs
- 83.243.60.238 ↩ mx.zeistmedia.de
- 2a00:19e0:3002:31f1::1 ↩ mx.zeistmedia.de
SOA Record
Raw SOA
ns1.ns-serve.net root.ns1.ns-serve.net 1634136944 10800 3600 604800 3600
Primary NS (mname)
ns1.ns-serve.net
Admin Email (rname)
root@ns1.ns-serve.net
Serial
1634136944
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
ns2.ns-serve.net
ns1.ns-serve.net
SPF Record
✗ MissingNo SPF record — domain is unprotected against spoofing.
⚠ No SPF record found. Email servers cannot verify authorized senders.
DMARC Record
✗ p=none
v=DMARC1; p=none;
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
DKIM Selectors
✓ 1 found
mail._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: mail
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
No TXT records found.
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