Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
sdr.de
No
None
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-27 10:05:38 UTC · ↺ Refresh
MX Hostnames
MX Priorities
- : 0
A / AAAA Records
- 217.66.32.25 ↩ otherweb.swr.de
Mail Server IPs
No IPs resolved.
SOA Record
Raw SOA
ns01.brandshelter.com hostmaster.swr.de 2026012600 10800 3600 604800 3600
Primary NS (mname)
ns01.brandshelter.com
Admin Email (rname)
hostmaster@swr.de
Serial
2026012600
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
ns02.brandshelter.net
ns01.brandshelter.com
SPF Record
✗ Invalid
v=spf1 -all
📊 DNS lookups: 0/10
⚠ Strict -all with no allowed senders — no servers can send email for this domain.
DMARC Record
✓ Reject
v=DMARC1; p=reject; pct=100; rua=mailto:[email protected]; adkim=s; aspf=s; sp=reject;
✓ Reject — strongest protection
📋 SPF alignment: Strict
· DKIM alignment: Strict
📧 Reports → mailto:[email protected]
↳ Subdomain policy: reject
DKIM Selectors
✗ None detectedNo 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 -all
Full email verification for sdr.de
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