cssbook.de

Valid Email Server
Domain Lookup › cssbook.de

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
cssbook.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-31 18:09:03 UTC · ↺ Refresh

MX Hostnames

  • ssl.fluxnetz.de

MX Priorities

  • ssl.fluxnetz.de: 100

A / AAAA Records

  • 49.12.90.201 ↩ ssl.fluxnetz.de

Mail Server IPs

  • 49.12.90.201 ↩ ssl.fluxnetz.de

SOA Record

Raw SOA a.ns14.net domains.fluxnetz.de 2022041900 43200 7200 1209600 1200
Primary NS (mname)
a.ns14.net
Admin Email (rname)
domains@fluxnetz.de
Serial
2022041900
Refresh
43200s
Retry
7200s
Expire
1209600s
Minimum TTL
1200s

Nameservers (NS)

a.ns14.net
d.ns14.net
b.ns14.net
c.ns14.net

SPF Record

✓ Soft Fail (~all)
v=spf1 ip4:49.12.90.201 ip4:49.12.90.199 ip4:176.9.136.229 ip4:176.9.136.227 ip6:2a01:4f8:fff0:49::2 ip6:2a01:4f8:fff0:49::3 mx:ssl.fluxnetz.de ?all
📊 DNS lookups: 1/10
? Neutral (?all) — no enforcement

DMARC Record

✗ Missing

No DMARC record — emails cannot be rejected on auth failure.

DKIM Selectors

✗ None detected

No 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

1 record
  • SPFv=spf1 ip4:49.12.90.201 ip4:49.12.90.199 ip4:176.9.136.229 ip4:176.9.136.227 ip6:2a01:4f8:fff0:49::2 ip6:2a01:4f8:fff0:49::3 mx:ssl.fluxnetz.de ?all
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