Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
simple-back.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-02 12:48:02 UTC · ↺ Refresh
MX Hostnames
- mail.simple-back.de
MX Priorities
- mail.simple-back.de: 10
A / AAAA Records
- 88.99.101.50 ↩ srv004.hyperworx.de
Mail Server IPs
- 88.99.101.50 ↩ srv004.hyperworx.de
SOA Record
Raw SOA
hydrogen.ns.hetzner.com dns.hetzner.com 2025120800 86400 10800 3600000 3600
Primary NS (mname)
hydrogen.ns.hetzner.com
Admin Email (rname)
dns@hetzner.com
Serial
2025120800
Refresh
86400s
Retry
10800s
Expire
3600000s
Minimum TTL
3600s
Nameservers (NS)
oxygen.ns.hetzner.com
helium.ns.hetzner.de
hydrogen.ns.hetzner.com
SPF Record
✓ Strict (-all)
v=spf1 +a +mx +a:srv004.hyperworx.de -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; adkim=s; aspf=s
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Strict
· DKIM alignment: Strict
⚠ No aggregate reports (rua= not set)
DKIM Selectors
✓ 1 found
default._domainkey
✓ Public key: 216 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
1 record- SPFv=spf1 +a +mx +a:srv004.hyperworx.de -all
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