Mailzo can use AI to help with email, but only if you turn it on. This page explains exactly what happens when you do. Our Privacy Policy has the full details.
AI and Your Data
Last updated: November 2026
AI is off until you choose
None of your email goes to any AI until you pick an AI in Settings › AI and turn on the features you want. Each feature has its own switch: summaries and explanations, writing replies, translating, filters in plain words, and searching in your own words.
You choose where AI runs
| Option | Where your request goes | Who can see it | Cost |
|---|---|---|---|
| Apple Intelligence | Stays on your Mac | Nobody else | Free |
| Your own key (Anthropic, OpenAI, Google, DeepSeek or Groq) | Straight from your Mac to that company | That company, under its own privacy terms | You pay them per use |
| Your own plan (a Claude or ChatGPT plan you already pay for) | Straight from your Mac to that company | That company, under its own privacy terms | Included in your plan |
Grayic never sees your AI requests or answers. They don't pass through our servers.
What gets sent
Only what the feature needs. For example:
- Summaries, explanations and translations: the email you're looking at
- Quick replies and writing: the email you're replying to, plus a short note on how you write, so replies sound like you. You can read and edit that note.
- Filters in plain words: the sentence you typed
- Searching in your own words: your question, and short passages from the emails that match it
What never gets sent
- Encrypted emails. They're never sent to any AI.
- Text hidden inside emails (for example, white text meant to trick AI). Mailzo removes it before anything reaches AI.
- Your passwords and sign-in details.
AI never acts on its own
AI writes drafts and suggestions. It never sends an email by itself. You always review before anything goes out.
Do AI companies train on my email?
- Apple Intelligence: no data leaves your Mac.
- Your own key or plan: it depends on the AI company's terms for your account. Most API services (such as Anthropic's and OpenAI's) say they don't train on API data by default. Consumer plans may have a setting for this. Check your provider's terms.
Connected AI apps
You can let outside AI apps, such as Claude on your Mac, use your email through Settings › MCP. This connection stays on your Mac. Searching and reading are allowed once you connect. Saving drafts, sending, moving and deleting each have their own switch, and all start off. Sending waits for your approval in Mailzo unless you change that. Settings › AI activity shows everything a connected app did.
Shared inboxes
On a shared team inbox, each person decides for themselves whether AI may be used on it.