cduhamburg.de

Valid Email Server
Domain Lookup › cduhamburg.de

Domain Overview

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

Checked via [email protected] · 2026-03-28 00:35:16 UTC · ↺ Refresh

MX Hostnames

  • smtp-relay.corpex-net.de
  • mx01.corpex-net.de
  • smtp-fallback.corpex-net.de

MX Priorities

  • smtp-relay.corpex-net.de: 100
  • smtp-fallback.corpex-net.de: 110
  • mx01.corpex-net.de: 10

A / AAAA Records

  • 194.6.194.57 ↩ minerva.cdu-hamburg.de

Mail Server IPs

  • 194.6.192.35 ↩ mx-backup.corpex-net.de
  • 80.252.109.12 (no PTR)
  • 194.6.192.31 ↩ corvusmajor.corpex-net.de

SOA Record

Raw SOA dns-auth-1.corpex-dns.de dnsmaster.corpex-dns.de 2026013002 28800 7200 3600000 3600
Primary NS (mname)
dns-auth-1.corpex-dns.de
Admin Email (rname)
dnsmaster@corpex-dns.de
Serial
2026013002
Refresh
28800s
Retry
7200s
Expire
3600000s
Minimum TTL
3600s

Nameservers (NS)

dns-auth-1.corpex-dns.de
dns-auth-2.corpex-dns.net

SPF Record

✓ Soft Fail (~all)
v=spf1 mx include:spf.corpex.de include:spf.brevo.com ~all
📊 DNS lookups: 3/10
~ Soft fail (~all) — moderate 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 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

4 records
  • brevo-code:203a77363c1fd0deb7907e9680181dd9
  • SPFv=spf1 mx include:spf.corpex.de include:spf.brevo.com ~all
  • brevo-code:6948ed1228b6880d145045164a2ef4cd
  • _globalsign-domain-verification=ks9Y-1HU1UAC5YuM4ff4EX082wuOJ1MZNYXGJ-b-l9
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