Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
cducsu.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-03 15:00:00 UTC · ↺ Refresh
MX Hostnames
- mail3.dbtg.de
- mail2.dbtg.de
- mail4.dbtg.de
- mail1.dbtg.de
MX Priorities
- mail1.dbtg.de: 50
- mail4.dbtg.de: 50
- mail3.dbtg.de: 500
- mail2.dbtg.de: 50
A / AAAA Records
- 185.96.12.60 ↩ www.cducsu.de
Mail Server IPs
- 193.17.243.101 ↩ mail1.dbtg.de
- 193.17.236.101 ↩ mail4.dbtg.de
- 193.17.243.102 ↩ mail3.dbtg.de
- 193.17.232.101 ↩ mail2.dbtg.de
SOA Record
Raw SOA
ns.udag.de hostmaster.united-domains.de 2026021250 10800 3600 604800 3600
Primary NS (mname)
ns.udag.de
Admin Email (rname)
hostmaster@united-domains.de
Serial
2026021250
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
ns.udag.net
ns.udag.de
ns.udag.org
SPF Record
✓ Soft Fail (~all)
v=spf1 a mx ip4:193.17.243.103/32 ip4:193.17.232.103/32 ip4:193.219.105.0/24 ip4:185.96.12.40/32 include:spf.crsend.com include:spf.sendinblue.com ~all
📊 DNS lookups: 4/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✓ Reject
v=DMARC1;p=reject;ruf=mailto:[email protected];rua=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 1 found
mail._domainkey
✓ Public key: 216 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
6 records- brevo-code:60a2840da3f2642813addccec42976a6
- google-site-verification=sFJ2wu3EUhJQQWj3YbG_9-1w8LsNmUnWGsA38jOSgZA
- apple-domain-verification=HTSp1vK3xrt7iYjm
- SPFv=spf1 a mx ip4:193.17.243.103/32 ip4:193.17.232.103/32 ip4:193.219.105.0/24 ip4:185.96.12.40/32 include:spf.crsend.com include:spf.sendinblue.com ~all
- mistral-domain-verification=6ed19f0efda401d0a54cb37ad84b33e55bd4c1d6
- cisco-ci-domain-verification=332b6e98f1fee4a18022641f6db6bad3f5c167a3e8f1e33ae90bfc620e3f607
Full email verification for cducsu.de
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