klasse09.teachfirst.de

Valid Email Server
Domain Lookup › klasse09.teachfirst.de
Live data — DNS records and disposable check were just fetched and saved.

Domain Overview

DNS: ⚡ live Checker: ⚡ live
klasse09.teachfirst.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-28 17:45:23 UTC · ↺ Refresh

MX Hostnames

  • mail.teachfirst.de

MX Priorities

  • mail.teachfirst.de: 10

A / AAAA Records

  • 83.137.102.39 (no PTR)

Mail Server IPs

  • 144.76.79.207 ↩ mailgate.iebl.de

SOA Record

No SOA record found.

Nameservers (NS)

No nameservers found.

SPF Record

✓ Strict (-all)
v=spf1 a mx ip4:144.76.79.207 ip6:2a01:4f8:192:1b6::2 -all
📊 DNS lookups: 2/10
✓ 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 a mx ip4:144.76.79.207 ip6:2a01:4f8:192:1b6::2 -all
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