Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
rathblume.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-28 17:03:36 UTC · ↺ Refresh
MX Hostnames
- mail.rbm.systems
MX Priorities
- mail.rbm.systems: 10
A / AAAA Records
- 195.90.220.171 ↩ mail.rbm.systems
Mail Server IPs
- 178.254.36.176 ↩ v30776.1blu.de
SOA Record
Raw SOA
ns01.1blu.de hostmaster.1blu.de 2026030802 43200 5400 604800 14400
Primary NS (mname)
ns01.1blu.de
Admin Email (rname)
hostmaster@1blu.de
Serial
2026030802
Refresh
43200s
Retry
5400s
Expire
604800s
Minimum TTL
14400s
Nameservers (NS)
ns01.1blu.de
ns02.1blu.de
SPF Record
✓ Strict (-all)
v=spf1 mx ra=postmaster -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected]; ruf=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
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 mx ra=postmaster -all
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