Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
tbz-flensburg.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-25 14:24:59 UTC · ↺ Refresh
MX Hostnames
- mx1.flensburg.de
MX Priorities
- mx1.flensburg.de: 10
A / AAAA Records
- 167.235.173.206 ↩ s8.gradwerk.tech
Mail Server IPs
- 193.188.197.137 ↩ krusty.flensburg.de
SOA Record
Raw SOA
ns.udag.de hostmaster.united-domains.de 2024101010 10800 3600 604800 3600
Primary NS (mname)
ns.udag.de
Admin Email (rname)
hostmaster@united-domains.de
Serial
2024101010
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
ns.udag.org
ns.udag.de
ns.udag.net
SPF Record
✓ Strict (-all)
v=spf1 mx ip4:193.188.197.137/32 ip4:213.178.85.0/24 a:er-mail.erecruiter.net include:spf.gradwerk.de ip4:212.100.43.128/27 ip4:212.100.49.8/29 -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ MissingNo DMARC record — emails cannot be rejected on auth failure.
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
3 records- SPFv=spf1 mx ip4:193.188.197.137/32 ip4:213.178.85.0/24 a:er-mail.erecruiter.net include:spf.gradwerk.de ip4:212.100.43.128/27 ip4:212.100.49.8/29 -all
- apple-domain-verification=wQ3MimprgpSRRQok
- MS=ms64350802
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