Privacy Policy

Effective November 2, 2026

Plainmail is a macOS email app made by Plain11, LLC (“we”). This policy explains what information Plainmail accesses, what it does with it, and where it is kept. The short version: Plainmail has no servers. Your email goes only between your mail provider and your Mac. We never receive, see, store or share your email or account information.

What Plainmail accesses

When you add an account, Plainmail connects directly from your Mac to that provider:

Google (Gmail and Google Workspace), through the Gmail API with your permission (the gmail.modify scope). Plainmail reads your messages and labels to show them; changes labels, read/unread, starred, archive, spam and trash status when you ask; creates, renames and deletes labels when you ask; and sends messages and saves drafts that you write. It does not permanently delete email and does not access other Google services.
Microsoft (Outlook.com), through IMAP and SMTP with your permission, to read, organize and send your email in the same way.
Other mail services, through IMAP and SMTP with the user name and password you enter.
Your Mac’s Contacts, only if you allow it in macOS, to suggest addresses as you type. Contacts are read on your Mac and never stored or sent anywhere by Plainmail.

You sign in to Google and Microsoft on their own pages. Plainmail never sees those passwords.

How your information is used

Plainmail uses your email and account data only to provide the features you see in the app: showing, searching, organizing, reading and sending your email. It is not used for advertising, is not sold, is not used to train any artificial intelligence or machine-learning models, and is not read by any person other than you.

Where your information is stored

Sign-in credentials (Google and Microsoft sign-in tokens, IMAP passwords) are stored only in your Mac’s Keychain, protected by macOS and never synced to other devices.
Downloaded email (messages you open and the message list) is kept on your Mac only, encrypted with a key held in your Keychain, so it doesn’t have to be downloaded again. You can delete it any time in Plainmail ▸ Settings ▸ Privacy.
Settings (such as your accounts’ addresses and your preferences) are stored on your Mac.

None of this is transmitted to Plain11, LLC or to any third party.

Sharing

We do not share, transfer or sell any user data, because we never receive any. Plainmail contains no analytics, advertising, tracking or crash-reporting services. The only connections it makes are to your mail providers (Google, Microsoft, or the mail servers you configure) and, when you choose “Load Remote Content” in a message, to the servers hosting that message’s images.

Google API Services User Data Policy

Plainmail’s use and transfer of information received from Google APIs to any other app will adhere to the Google API Services User Data Policy, including the Limited Use requirements.

Removing your data

Remove an account in Plainmail ▸ Settings ▸ Accounts: its sign-in credentials and downloaded email are deleted from your Mac.
Revoke Plainmail’s access to Google at any time at myaccount.google.com/permissions, or to Microsoft at account.live.com/consent/Manage.
To remove everything Plainmail stored, remove your accounts in Settings ▸ Accounts before deleting the app.

Security

All connections to mail providers are encrypted (TLS). Plainmail blocks remote images and tracking pixels by default and runs in Apple’s App Sandbox.

Changes and contact

If this policy changes, the new version will be posted on this page with a new effective date. Questions: privacy@plain11.com.