Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
ctsd.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-29 06:48:25 UTC · ↺ Refresh
MX Hostnames
- mx-02-eu-central-1.prod.hydra.sophos.com
- mx-01-eu-central-1.prod.hydra.sophos.com
MX Priorities
- mx-01-eu-central-1.prod.hydra.sophos.com: 10
- mx-02-eu-central-1.prod.hydra.sophos.com: 20
A / AAAA Records
- 81.209.248.226 ↩ r21.hallo.cloud
Mail Server IPs
- 18.159.80.41 ↩ ec2-18-159-80-41.eu-central-1.compute.amazonaws.com
- 52.57.183.85 ↩ ec2-52-57-183-85.eu-central-1.compute.amazonaws.com
SOA Record
Raw SOA
ns26.ns26.de j\.wuerzebesser.ctsd.de 2026032202 10800 3600 604800 10800
Primary NS (mname)
ns26.ns26.de
Admin Email (rname)
j\@wuerzebesser.ctsd.de
Serial
2026032202
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
10800s
Nameservers (NS)
ns27.ns27.de
ns26.ns26.de
ns28.ns28.de
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:_spf.prod.hydra.sophos.com a:r21.hallo.cloud -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; pct=100; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
4 records- MS=ms47515924
- sophos-domain-verification=aa1c6aa27008c212de54d0cdb41f816f67fd819f428c0cff57f412715cc9e1c6
- sophos-domain-verification=6c6944d48141a490cbe9aba4b55b05ed819587ec
- SPFv=spf1 include:spf.protection.outlook.com include:_spf.prod.hydra.sophos.com a:r21.hallo.cloud -all
Full email verification for ctsd.de
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