# Pelton

> Pelton is a free and open-source desktop email client for macOS, Windows and Linux.
> Mail is downloaded to the user's own machine and stored in a local database alongside
> their own IMAP provider. There is no Pelton account, no Pelton server, and no telemetry.
> Licensed GPL-3.0.

Built with Go and Wails, with a Svelte interface rendered in the system webview rather than
a bundled browser. The current release is 2026.4.

## What it does

- Standard IMAP and SMTP, so it works with most providers without a plugin
- Unified inbox across multiple accounts, plus per-account folder trees
- Offline: cache recent mail for a chosen timeframe, pin individual messages permanently
- Local full-text search that works with the network off
- PGP and S/MIME, both off until enabled, with all key handling local
- Phishing checks: SPF, DKIM and DMARC results, display-name spoofing, off-domain Reply-To,
  lookalike sender domains
- Remote images and tracking pixels blocked by default, allowed per message
- Eight colored flags, local or synced as IMAP $Label1 through $Label8
- Saved Views: a search that opens like a folder, with a live count
- Command palette on Cmd+K over folders, views, messages, settings and menu actions
- Profiles: separate settings, accounts, flags and sidebar layout per context
- Snooze, send later, reading tabs, bulk actions, CardDAV
- Native notifications via Notification Center, Windows toasts and Linux dbus
- Themes built from CSS variables, with a color picker, custom CSS and one-file export
- Vim mode, rebindable shortcuts, configurable trackpad swipes
- Three density settings and three corner styles

## Privacy

- The app makes no request to any server operated by the Pelton project
- No telemetry, no analytics, no automated crash reporting
- No account, no license check, no forced update ping
- Mail lives in a local database file the user can delete outright

## MCP server

Pelton can run a local Model Context Protocol server so an agent the user already runs can
read the mail cached on their machine. It is off by default, binds to 127.0.0.1 only, and
starts read-only with five read tools. Seven write tools (mark_read, move_message,
archive_message, flag_message, set_flag_color, delete_message, send_message) are granted
one at a time and all start off. send_message queues a draft for human approval and does
not put mail on the wire. delete_message moves to trash. Attachment file contents are never
returned, only names, types and sizes. Pelton itself contains no model and calls no AI
provider.

## Pages

- [Home](https://pelton.app/): overview and features
- [Download](https://pelton.app/download): builds for macOS, Windows and Linux
- [Privacy and security](https://pelton.app/privacy-security): what leaves the machine and what does not
- [Changelog](https://pelton.app/changelog): what changed per release
- [Community](https://pelton.app/community): contributing, source, Discord
- [Design system](https://pelton.app/design): color, type, spacing, density and logo tokens

## Project

- Source: https://github.com/TRC-Loop/Pelton
- Organisation: https://github.com/peltonapp
- Releases: https://github.com/TRC-Loop/Pelton/releases
- Documentation: https://docs.pelton.app
- Theme gallery: https://themes.pelton.app
- Licence: GPL-3.0
- Contact: contact@pelton.app