cubewerk.de

Valid Email Server
Domain Lookup › cubewerk.de
Live data — DNS records and disposable check were just fetched and saved.

Domain Overview

DNS: ⚡ live Checker: ⚡ live
cubewerk.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-09-04 20:09:03 UTC · ↺ Refresh

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MX Hostnames

  • mx2.securepostfach.de
  • mx3.securepostfach.de

MX Priorities

  • mx3.securepostfach.de: 10
  • mx2.securepostfach.de: 10

A / AAAA Records

  • 91.204.46.79 ↩ a2e4f.netcup.net
  • 2a03:4000:30:910e::13:7619 (no PTR)

Mail Server IPs

  • 178.254.30.19 ↩ mx3.securepostfach.de
  • 2a00:6800:3:f71::1 (no PTR)
  • 188.68.35.100 ↩ mx2.securepostfach.de
  • 2a03:4000:10:673::1 ↩ mx2.securepostfach.de

SOA Record

Raw SOA root-dns.netcup.net dnsadmin.netcup.net 2026082600 28800 7200 1209600 60
Primary NS (mname)
root-dns.netcup.net
Admin Email (rname)
dnsadmin@netcup.net
Serial
2026082600
Refresh
28800s
Retry
7200s
Expire
1209600s
Minimum TTL
60s

Nameservers (NS)

second-dns.netcup.net
third-dns.netcup.net
root-dns.netcup.net

SPF Record

✓ Strict (-all)
v=spf1 mx a a:securetransport.cubewerk.de -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✓ Reject
v=DMARC1;p=reject
✓ Reject — strongest protection
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)

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

2 records
  • google-site-verification=F0H5sZJALUSkxiaqygK701ikZ8qXCIDUvkipyw2ht3c
  • SPFv=spf1 mx a a:securetransport.cubewerk.de -all
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