sf-tec.de

Valid Email Server
Domain Lookup › sf-tec.de

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
sf-tec.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-31 02:59:13 UTC · ↺ Refresh

MX Hostnames

  • mx.sf-mail.de

MX Priorities

  • mx.sf-mail.de: 0

A / AAAA Records

  • 159.69.22.227 ↩ static.227.22.69.159.clients.your-server.de
  • 2a01:4f8:1c1c:363b:73:6674:6563:6465 ↩ www.sf-tec.de

Mail Server IPs

  • 116.202.16.50 ↩ mail.sf-mail.de
  • 2a01:4f8:1c17:6fae::786d (no PTR)

SOA Record

Raw SOA ns1.sf-tec.de hostmaster.sf-tec.de 1774923335 16384 2048 1048576 2560
Primary NS (mname)
ns1.sf-tec.de
Admin Email (rname)
hostmaster@sf-tec.de
Serial
1774923335
Refresh
16384s
Retry
2048s
Expire
1048576s
Minimum TTL
2560s

Nameservers (NS)

ns2.sf-tec.de
ns1.sf-tec.de

SPF Record

✓ Strict (-all)
v=spf1 include:_spf.sf-mail.de -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 include:_spf.sf-mail.de -all
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