AI cleans your Fastmail inbox once. Rules keep it clean forever.
AI for Mail is an AI-guided assistant that learns how you already sort your Fastmail inbox, then writes Sieve rules so future mail sorts itself — without calling an AI on every message.
Organise
Important, Personal, Papertrail, Informational, Marketing — the AI sorts your existing inbox by the same logic you'd use, then turns the patterns into rules.
Protect
Every email's headers, domains, and links are checked for phishing patterns. Catches scams that look real, including brand impersonation hidden in images.
Why this works for a subscription
Most "AI email assistant" products call an LLM on every incoming message. The math doesn't add up — the AI cost per user grows with their inbox. AI for Mail flips the model: AI runs once to learn your patterns and emit Sieve rules, then Fastmail's built-in filter engine runs those rules at zero marginal cost. AI re-engages only when a rule misfires or your patterns drift.
What you keep control of
- Every rule is shown in plain English before it's installed. Approve or reject each one.
- The dashboard tracks which rules fire, which get reverted, and which need adjusting.
- Your email content never leaves the request — we only store rule metadata, not message bodies.
- Built specifically for Fastmail. JMAP-native, OAuth-based, no IMAP password sharing.
Status
Private beta. The product is being dogfooded on real Fastmail inboxes and is not yet open for self-serve signup. If you're a Fastmail user with a chronically full inbox and you'd like to try it, get in touch.
Early access
Email hello@ai-for-mail.com with a sentence about your inbox: how many unread, what you'd want sorted, and which Fastmail account you'd connect.
We'll reply when there's a slot. No marketing list, no automated drip — just an email back from a person.