thunderbird.net

Thunderbird — Free Your Inbox. — Thunderbird

Overview

• Status: alive
• First seen: 2026-09-21
• Last crawled: 2026-09-22
• Security grade: D (65/100)
• TLS certificate expires: 2026-12-18
• Inbound links seen: 11

Security & email signals

• ✓ HTTPS
• ✓ HSTS
• ✗ Content-Security-Policy
• ✗ X-Content-Type-Options
• ✓ X-Frame-Options
• ✗ Referrer-Policy
• ✗ Permissions-Policy
• ✓ SPF record
• ✓ DMARC record
• ✗ DKIM record
• ✓ Cookies set securely
• ✓ Has real content (not an empty shell)
• ✓ Valid TLS certificate

Detected technology

Infrastructure: Cloudflare

Recent changes

• 2026-09-22 — TLS expiry changed from "2026-12-18" to "2026-12-18"

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