assertion.de

Valid Email Server
Domain Lookup › assertion.de

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
assertion.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-29 21:28:54 UTC · ↺ Refresh

MX Hostnames

  • mail.assertion.de

MX Priorities

  • mail.assertion.de: 10

A / AAAA Records

  • 94.130.6.200 ↩ terekay.assertion.de

Mail Server IPs

  • 94.130.6.201 ↩ testudo.assertion.de

SOA Record

Raw SOA hydrogen.ns.hetzner.com dns.hetzner.com 2025111400 86400 10800 3600000 3600
Primary NS (mname)
hydrogen.ns.hetzner.com
Admin Email (rname)
dns@hetzner.com
Serial
2025111400
Refresh
86400s
Retry
10800s
Expire
3600000s
Minimum TTL
3600s

Nameservers (NS)

hydrogen.ns.hetzner.com
oxygen.ns.hetzner.com
helium.ns.hetzner.de

SPF Record

✓ Strict (-all)
v=spf1 mx -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ Missing

No DMARC record — emails cannot be rejected on auth failure.

DKIM Selectors

✗ None detected

No 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 -all
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