sfs-online.de

Valid Email Server
Domain Lookup › sfs-online.de

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
sfs-online.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-25 06:01:51 UTC · ↺ Refresh

MX Hostnames

  • smtpin.rzone.de

MX Priorities

  • smtpin.rzone.de: 5

A / AAAA Records

  • 185.60.251.251 (no PTR)

Mail Server IPs

  • 81.169.145.97 ↩ smtpin.rzone.de
  • 2a01:238:20a:202:50f0::1097 ↩ smtpin.rzone.de

SOA Record

Raw SOA docks09.rzone.de hostmaster.strato-rz.de 2020050721 86400 7200 604800 300
Primary NS (mname)
docks09.rzone.de
Admin Email (rname)
hostmaster@strato-rz.de
Serial
2020050721
Refresh
86400s
Retry
7200s
Expire
604800s
Minimum TTL
300s

Nameservers (NS)

shades20.rzone.de
docks09.rzone.de

SPF Record

✗ Missing

No SPF record — domain is unprotected against spoofing.

⚠ No SPF record found. Email servers cannot verify authorized senders.

DMARC Record

✗ Missing

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

DKIM Selectors

✓ 1 found
mail._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: mail

Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses

All TXT Records

1 record
  • brevo-code:c6d3151afdb7d9b7ff01e9968380c0a6
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