Fastmail Bot — What It Is and How to Handle It

Fastmail Bot is a link preview crawler that fetches page metadata to generate rich previews when URLs are shared.

Operator: Fastmail | Type: Preview | Category: Preview

Fastmail Bot is classified as preview. Use Centinel to monitor its behavior and decide whether to allow, block, challenge, or monetize its access to your content.

Centinel automatically detects Fastmail Bot using behavioral fingerprinting. When detected, you can allow it, block it, challenge it with an interstitial page, or set a per-request licensing fee — all enforced in real-time with under 2ms latency.