# Foundry376/Mailspring

> Open-source mail client for Mac, Windows and Linux built with Electron and React, using a C++ sync engine based on Mailcore2. Supports unified inbox, snooze, send later, mail rules and templates, and is extensible via plugins and themes.

- Magnitude: 0.8 out of 10 — Steady
- Stars: 17,858 total · +0 stars on 2026-09-25 (UTC), ≈ 2 by evening
- Star trust: star growth looks organic
- Category: Apps · Language: TypeScript · License: GPL-3.0 · Created: 2016-10-13 · Last push: 2026-09-23
- GitHub: https://github.com/Foundry376/Mailspring · Homepage: https://getmailspring.com/ · Page: https://gitnova.dev/en/r/Foundry376/Mailspring

## Useful for

- Set up a unified inbox across multiple IMAP accounts
- Write a plugin or theme to customize the client UI
- Build Mailspring from source for your platform

## Why it’s here

- 0 stars so far today, about 2 expected by the end of the day.

## Star trust

Star growth looks organic.

Star-trust labels are heuristics based on the repository’s behavior, not a check of every stargazer.

## Numbers

- Forks: 1,040
- Issues and pull requests: 2,894
- Watchers: 181
- Average over the last week: 4 per day
- Usual pace: 6 per day
- Latest release: 1.25.0 (2026-09-19)

## Stars per day, last 30 days (oldest → newest, today is partial)

2026-10-04 … 2026-11-02: None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None

## Magnitude by day, last 12 days

09-14 1.7, 09-15 3.4, 09-16 2.1, 09-17 2.0, 09-18 1.6, 09-19 0.6, 09-20 0.8, 09-21 0.8, 09-22 0.9, 09-23 1.0, 09-24 1.1, 09-25 1.0

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Magnitude (0–10) measures how fast and how unusually interest in a repository is growing right now. It is not a quality score.
Days are UTC. “So far today” is a fact; “expected by the end of the day” is a forecast.
Summaries and use cases are written by an LLM (DeepSeek V4.1 Flash) from the README and may be inaccurate: verify specific claims (benchmarks, speed, hardware) in the repository itself.
Data as of 2026-09-25 10:07 UTC, updated every 30 minutes.