Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
biothan.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-25 09:48:47 UTC · ↺ Refresh
MX Hostnames
- mail2.re-fd.de
- mail.re-fd.de
MX Priorities
- mail.re-fd.de: 10
- mail2.re-fd.de: 10
A / AAAA Records
- 212.218.67.148 (no PTR)
Mail Server IPs
- 212.218.67.75 ↩ mail.re-fd.de
- 212.218.67.77 ↩ mail2.re-fd.de
SOA Record
Raw SOA
dns9.nethinks.com hosting.nethinks.com 2026021101 3600 1800 1209600 86400
Primary NS (mname)
dns9.nethinks.com
Admin Email (rname)
hosting@nethinks.com
Serial
2026021101
Refresh
3600s
Retry
1800s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
dns10.nethinks.com
dns9.nethinks.com
SPF Record
✓ Soft Fail (~all)
v=spf1 +a +mx +ip4:212.218.193.6 +ip4:212.218.193.69 +ip4:212.218.67.64/26 ~all
📊 DNS lookups: 2/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
~ Quarantine
v=DMARC1;p=quarantine;pct=100;rua=mailto:[email protected]
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 1 found
default._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: default
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
2 records- MS=ms24276085
- SPFv=spf1 +a +mx +ip4:212.218.193.6 +ip4:212.218.193.69 +ip4:212.218.67.64/26 ~all
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