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Mailspring for Mac
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Mailspring 1.21.0

  -  161 MB  -  Demo
Free Download

Safe & Secure

Sometimes latest versions of the software can cause issues when installed on older devices or devices running an older version of the operating system.

Software makers usually fix these issues but it can take them some time. What you can do in the meantime is to download and install an older version of Mailspring 1.21.0.


For those interested in downloading the most recent release of Mailspring for Mac or reading our review, simply click here.


All old versions distributed on our website are completely virus-free and available for download at no cost.


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If you have any questions or ideas that you want to share with us - head over to our Contact page and let us know. We value your feedback!

Download Mailspring 1.21.0
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  • Mailspring 1.21.0 Screenshots

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    Mailspring 1.21.0 Screenshot 1
  • Mailspring 1.21.0 Screenshot 2
  • Mailspring 1.21.0 Screenshot 3

What's new in this version:

Features:
- Added Reply-To field to the composer header, allowing you to specify a different reply address when composing messages
- Added bulk RFC2822 message export functionality to the sync engine

Fixed:
- Fixed HTTP/2 framing errors that could crash the sync engine during metadata streaming
- Prevented global keyboard shortcuts from firing when focus is in the composer
- Strictly validate accent color hex values from system preferences to prevent errors

Claude Security Audit:
- Tightened validation to prevent file:// URIs in email content
- Limited path traversal in protocol handler
- Added allowlist validation for IPC window and webcontents methods
- Improved HTML sanitization in the composer when pasting content
- mailto links no longer support the ?attach= query parameter
- Improved attachment name sanitization for security and compatibility
- Improved email sanitization to block CSS @import tracking vectors
- Added package name validation to prevent path traversal attacks
- Added URL validation to the autoupdate handler
- Show a notice about plugin trust when installing third-party plugins.

Improvements:
- When a detailed error log is available during OAuth sign-in, it is now displayed to help with troubleshooting.
- Used exec in mailsync wrapper script for direct signal delivery

Developer:
- Migrated build system from Grunt to a standalone Node.js script
- Added option to skip installer creation in the build script
- Dropped .map files from distribution packages
- Replaced long-deprecated Raven with native Sentry envelope implementation and send sourcemaps during build
- Upgraded TypeScript target from es2017 to es2024
- Refactored TypeScript compilation cache and only enable in dev mode
- Removed macOS Touch Bar support
- Updated ESLint and Prettier, and reference local versions in VS Code settings
- Added missing TypeScript types to function declarations across many files
- Upgraded Electron 41.2.1 to Electron 41.5.0
- Added Playwright tests for pre-release verification
- Added tests covering VCF/EML business logic and other utilities

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