Privacy policy

Updated November 11, 2026

Petrel is a mail app that runs on your Mac. We do not run servers for it and we receive no data from it: no analytics, no tracking, no advertising, no account with us.

What stays on your Mac

Your mail, contacts, keys and settings are stored only on your Mac. Passwords, sign-in tokens and secret keys are kept in the macOS keychain.

Who Petrel talks to

• The mail, news, chat and feed servers you add.
• The sign-in page of your mail provider (for example Google or Microsoft), only when you choose to sign in that way.
• Thunderbird's public server directory, with your mail domain (never your address), to find server settings.
• A sender's unsubscribe address, only when you press Unsubscribe.

Pictures inside messages are blocked until you allow them.

Google user data

When you sign in with Google, Petrel receives access to your Gmail over IMAP and SMTP (the scope https://mail.google.com/) and your name. Petrel uses this access only to show, send and organise your own mail on your Mac. The data is never sent to us or anyone else, never used for advertising and never used to train AI models. Petrel's use of information received from Google APIs adheres to the Google API Services User Data Policy, including the Limited Use requirements. Removing the account in Petrel deletes its sign-in token from the keychain; you can also revoke access at myaccount.google.com/permissions.

Contact

NesDesignCo · creativenesdesigns@gmail.com