Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
seminar-esslingen.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-20 22:24:06 UTC · ↺ Refresh
MX Hostnames
- mx01.seminar-bw.de
- mx02.seminar-bw.de
MX Priorities
- mx01.seminar-bw.de: 10
- mx02.seminar-bw.de: 10
A / AAAA Records
- 195.82.81.36 (no PTR)
Mail Server IPs
- 164.30.16.127 ↩ mx01.seminar-bw.de
- 164.30.21.8 ↩ mx02.seminar-bw.de
SOA Record
Raw SOA
ns3.powerdns.de technik.udmedia.de 2026021002 10800 3600 1209600 3600
Primary NS (mname)
ns3.powerdns.de
Admin Email (rname)
technik@udmedia.de
Serial
2026021002
Refresh
10800s
Retry
3600s
Expire
1209600s
Minimum TTL
3600s
Nameservers (NS)
ns4.powerdns.de
ns3.powerdns.de
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;sp=reject;adkim=s;aspf=s
✓ Reject — strongest protection
📋 SPF alignment: Strict
· DKIM alignment: Strict
⚠ No aggregate reports (rua= not set)
↳ 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
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