https://github.com/hkdb/aerion

An Open Source Lightweight E-Mail Client
https://github.com/hkdb/aerion

cross-platform desktop-app desktop-application desktop-apps e-mail gui imap-client imaps-inbox keyboard-warriors linux-desktop mail mail-client opinionated smtp-client wails-app

Last synced: about 2 months ago
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An Open Source Lightweight E-Mail Client

• Host: GitHub
• URL: https://github.com/hkdb/aerion
• Owner: hkdb
• License: apache-2.0
• Created: 2026-01-15T07:25:16.000Z (5 months ago)
• Default Branch: main
• Last Pushed: 2026-03-28T03:59:30.000Z (3 months ago)
• Last Synced: 2026-03-28T08:53:42.438Z (3 months ago)
• Topics: cross-platform, desktop-app, desktop-application, desktop-apps, e-mail, gui, imap-client, imaps-inbox, keyboard-warriors, linux-desktop, mail, mail-client, opinionated, smtp-client, wails-app
• Language: Go
• Homepage: https://aerion.3df.io
• Size: 1.62 MB
• Stars: 152
• Watchers: 2
• Forks: 12
• Open Issues: 22
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • Contributing: CONTRIBUTING.md
  • License: LICENSE
  • Security: SECURITY.md

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README

          
![Logo](frontend/src/assets/images/logo-universal.png)

# Aerion - An Open Source Lightweight E-Mail Client

Maintained by: @hkdb

![screenshot](docs/ss.png)

### ❓ Why?

---

Windows has Outlook

Mac has Mail

Linux has.....

 - Thunderbird - Clunky and too much legacy structure

 - Geary - Crippled by Gnome Online Accounts and search is unreliable

 - Mailspring - Electron...

 - Evolution - ... 1999

All are not necessarily always light on resource consumption...

### 👁️‍🗨️ Summary

---

A standalone lightweight e-mail client inspired by [Geary](https://wiki.gnome.org/Apps/Geary) focused on achieving the following goals:

- Resource Efficiency - Minimal CPU, RAM, and battery consumption

- Modern UX - Clean, intuitive interface with dark mode support

- Keyboard & Mouse Friendly - Full keyboard navigation with vim-style shortcuts

- Independence - No dependency on Gnome Online Accounts or other system services

- Search That Works - Basic search that actually finds your emails

### 🖥 OS Support

---

Although Linux is a first-class citizen here, it should also work on:

- MacOS

- Windows

### 🪶 Features

---

- Multiple Accounts

- Providers: (🧪 = NOT YET TESTED)

    - Generic IMAP/SMTP

    - GMail

    - Microsoft 365 / Outlook

    - Yahoo 🧪

    - Proton Mail (via Proton Bridge)

    - iCloud Mail 

    - Fastmail 🧪

    - Zoho Mail 🧪

    - AOL Mail 🧪

    - GMX Mail 🧪

    - Mail.com 🧪

- Unified Inbox (Color Code Accounts)

- Conversation Threads

- Basic Removal of Tracking Elements in Mail Content

- WYSIWYG Detachable Composer ([TipTap Editor](https://github.com/ueberdosis/tiptap))

- WYSIWYG Signatures ([TipTap Editor](https://github.com/ueberdosis/tiptap))

- CardDav/Google/Microsoft Contact Sync for auto-complete

- Basic Search

- Notification that brings focus to the e-mail when clicked

- Auto-Sync when system wakes from suspend

- Multiple color themes (More to come...)

- PGP & S/MIME support

- [Keyboard Shortcuts](docs/KEYBOARD_SHORTCUTS.md)

### 🚀 Installation

---

- [Official Installation Guide](https://aerion.3df.io/docs/getting-started/installation/)

### 📖 Documentation

---

- [Official Documentation](https://aerion.3df.io/docs/intro)

### ⚗️ Tech Stack

---

This application was built with [Wails](https://wails.io) + [Svelte](https://svelte.dev/).

Transparency Disclaimer: This project leaveraged Claude models heavily to implement.

### 🧑🏻‍💻 Roadmap

---

Confirmed future features:

- Search feature in `copy to` and `move to` dialog

- Visually differentiate folders and subfolders in `copy to` and `move to` dialog

- Auto-sync all non-core folders (Core = Inbox, Sent, Draft, Trash)

- Selective auto-sync of non-core folders

- Extension/Plugin system with the following shipped disabled:

    - Calendar

    - Contacts

Potential features in the future:

- Customizable shortcut keys

- Advance Search

- Explore the possibility of supporting [Age](https://github.com/FiloSottile/age) as an encryption method

- AI Assisted Composition (Ollama)

### 💰 Sponsorship

---

[3DF](https://3df.io) is sponsoring by way of dedicating its cloud infrastructure resources and the team's time to work on this. There's otherwise currently no sponsorship. If you like this project, please feel free to give us a star or buy us a coffee:

[!["Buy Me A Coffee"](https://www.buymeacoffee.com/assets/img/custom_images/yellow_img.png)](https://www.buymeacoffee.com/3dfosi)

### 🏷️ Changelog

---

[CHANGELOG.md](CHANGELOG.md)

### 📑 Terms of Use & Privacy Policy

---

- [Terms of Use](docs/TERMS.md)

- [Privacy Policy](docs/PRIVACY.md)