Download Mailspring 1.26.2
Safe so farDeveloper: Foundry 376, LLC
Last updated: · Verification by Cristian Gonzalez Guasch
Boost your productivity and send better email with Mailspring, the best mail client for Mac, Linux, and Windows.
Every download button links to the official download package, we host no files.
Downloads
Windows 1.26.2
Show SHA-256
a1dfcbf573f05f705ce717d6b7911f2e5a7d6aac0f7dfc0c824f3d78f44c5827 Mac 1.26.2
Show SHA-256
f2f4d26fd6613b2cd1b1434ebd018cbc073557de5034ef07ce1336b55d7dc27e Show SHA-256
4ca6a0d995e51583c2dc4c43bdccfb4a96ed61867f0e8e18486954ba55f83dce Linux 1.26.2
The publisher offers a 64-bit (x64) build for Intel or AMD PCs. The package data states no minimum Windows version, so check the publisher’s system requirements before installing on an older PC. Choose the Apple silicon (ARM64) build for Macs with an M-series chip and the Intel (x64) build for older Intel Macs. Every build needs macOS 13 Ventura or later. Choose the x64 (64-bit) download for Intel or AMD computers and the ARM64 download for ARM computers. The Flathub listing states no minimum Linux version or distribution, so check the publisher’s system requirements before installing.
Install with winget: winget install --id Foundry376.Mailspring --exact
Install with Homebrew: brew install --cask mailspring
Install with Flatpak (Flathub): flatpak install flathub com.getmailspring.Mailspring
Check a download: Get-FileHash .\<file> -Algorithm SHA256 (PowerShell) or shasum -a 256 ~/Downloads/<file> (Terminal) and compare it with the SHA-256 above.
Linux (Flatpak): Flathub publishes no file checksum; Flatpak checks the app against Flathub’s signed repository when it installs. Flathub shows this app as publisher-verified. App page on Flathub.
What the installer does
Windows
- Delivered as a standalone setup program (.exe) for x64.
- Installs for the current user only, so administrator rights are normally not needed.
- Supports unattended install with
--silent. - Declared install modes: interactive and silent.
- Upgrades install over the existing version.
Mac
- Delivered as a ZIP archive for Intel (x64) and Apple silicon (ARM64).
- Installs the app
Mailspring.appinto the Applications folder. - Requires macOS 13 or later.
- The app updates itself, so it may be newer than the version Homebrew lists.
- A full “zap” removal also deletes up to 7 support, cache and preference locations in your home folder.
Linux
- Delivered as a "flatpak" installer for x64 and ARM64.
- The manifest does not state an install scope.
- No silent-install switch is declared in the manifest.
Description
Boost your productivity and send better email with Mailspring, the best mail client for Mac, Linux, and Windows.
Mailspring at a glance
| What it is | Boost your productivity and send better email with Mailspring, the best mail client for Mac, Linux, and Windows. |
|---|---|
| Latest version | Windows 1.26.2 (October 22, 2026) Mac 1.26.2 Linux 1.26.2 (October 22, 2026) |
| Price | Free and open source |
| Open source | Yes |
| License | GPL-3.0 |
| License type | Open source · Strong copyleft Software built on it must be shared under the same license. |
| Copyright | © 2017-2026 Foundry 376, LLC. |
| Made by | Foundry 376, LLC |
| Category | Email clients |
| Runs on | Windows, Mac, Linux |
| Official website | getmailspring.com |
| More links | Support · Privacy policy · Release notes · Pricing / purchase |
| Source code | github.com/Foundry376/Mailspring |
| Tags | email mail |
| winget ID | Foundry376.Mailspring |
| Homebrew cask | mailspring |
| Flathub | com.getmailspring.Mailspring Verified data from Flathub |
| Flathub verification | Publisher verified on Flathub, 2026-08-26 |
| License on Flathub | GPL-3.0+ as listed on Flathub |
| winget moniker | mailspring |
| Check your download | SHA-256 checksums in the download tables · Security scan |
What’s new in Mailspring 1.26.2
1.26.2 (10/22/2026) This is a security patch release. Eight eMudhra intermediate certificates had their private keys compromised, so an attacker holding one could impersonate any mail server or website. (https://emudhra.we-have-a-problem.com/) The previous release (1.26.1) updated Electron, and this release ensures that Mailspring's sync engine delegates trust decisions to the system certificate chain on every platform and for every connection (IMAP, SMTP, Caldav, etc). MacOS and Windows invalidated the eMudhra certificates by adding them to a separate "distrust" policy store, and this release ensures that Mailspring consults that list and well as the certificate trust chain when opening secure connections. Bug Fixes: - Fixed emails that declare a dark color scheme turning the message background black. (#2988) - Fixed the Back and Close buttons in account setup not responding to clicks. - The MCP server's reply_to_thread tool now loads the message body before quoting it. - On macOS, fixed the Darkside theme's window controls sticking to the top of the window. (#2984) Thanks @AlexandreAgrn! - Fixed calendar and contacts sync leaving a network connection open after every request, which piled up hundreds of open sockets per account over time. Thanks @Alintya.
Read the full release notes on the publisher’s site
Notes for older versions are inside each version below.
Is Mailspring safe?
Score result: No detections so far
None of the 58 security engines on VirusTotal flagged any of the 3 scanned files.
Covers 3 of 4 files. The rest have no VirusTotal report yet, so this result does not speak for them.
- 0 flagged in total
- 3 of 4 files scanned
- 58 engines
Scan info
- Last scan
- Scan provider
- VirusTotal · Full report
File integrity
| File | SHA-256 | Hash check | Signature | VirusTotal |
|---|---|---|---|---|
| MailspringSetup.exeWindows · x64 (64-bit) | a1dfcbf573f05f705ce717d6b7911f2e5a7d6aac0f7dfc0c824f3d78f44c5827 |
Matches the manifest (re-computed) | Valid | 0/58 flagged |
| Mailspring.zipMac · Intel (x64) | f2f4d26fd6613b2cd1b1434ebd018cbc073557de5034ef07ce1336b55d7dc27e |
Matches the manifest (re-computed) | Not applicable | 0/56 flagged |
| Mailspring-AppleSilicon.zipMac · Apple silicon (ARM64) | 4ca6a0d995e51583c2dc4c43bdccfb4a96ed61867f0e8e18486954ba55f83dce |
Matches the manifest (re-computed) | Not applicable | 0/57 flagged |
| com.getmailspring.Mailspring.flatpakrefLinux · x64 (64-bit) | Not provided | Copied from the manifest, not re-computed | Not checked | — |
| Hash re-computed by Everyversion | 3 of 3 installers match. |
|---|---|
| Code signature checked | 1 valid, 2 not signable (ZIP/portable). |
We host no installers. Every download link goes to the download location named in the package listing, normally the publisher’s own server. For this software we downloaded the files from that source ourselves, re-computed each checksum and checked the code signature where our tools could, as shown above. A passing check shows a file is the one that was published; it is not a guarantee it is free of problems. For more information, visit our Security and Trust Center.
Source and provenance
| Windows: source | microsoft/winget-pkgs |
|---|---|
| Windows: SHA-256 in upstream manifest | Yes |
| Windows: observed at commit | ca3de5f957f4 · retrieved 2026-11-07 |
| Mac: source | Homebrew/homebrew-cask |
| Mac: SHA-256 in upstream manifest | Yes |
| Mac: observed at commit | 286239cc5939 · retrieved 2026-11-07 |
| Linux: source | Flathub · Flathub API · github.com/flathub/com.getmailspring.Mailspring |
| Linux: checksum | None published. Flatpak checks the app against Flathub’s signed repository when it installs. |
| Linux: publisher verified | Publisher verified on Flathub, 2026-08-26 |
| Linux: data retrieved | 2026-11-08 · attribution: app data from Flathub, license listed there: GPL-3.0+ |
Old versions
Windows versions
Showing the newest 20 of 38 versions (the JSON and Markdown versions list 38). Open a version for its installers, checksums and a command that pins it.
1.26.2 latest · 2026-10-22 · 1 installer notes
| Architecture | Format | Scope | SHA-256 | Download |
|---|---|---|---|---|
| x64 (64-bit) | EXE | Per user | a1dfcbf573f05f705ce717d6b7911f2e5a7d6aac0f7dfc0c824f3d78f44c5827 |
Download |
Pin this version: winget install --id Foundry376.Mailspring --version 1.26.2 --exact
Release notes
1.26.2 (10/22/2026) This is a security patch release. Eight eMudhra intermediate certificates had their private keys compromised, so an attacker holding one could impersonate any mail server or website. (https://emudhra.we-have-a-problem.com/) The previous release (1.26.1) updated Electron, and this release ensures that Mailspring's sync engine delegates trust decisions to the system certificate chain on every platform and for every connection (IMAP, SMTP, Caldav, etc). MacOS and Windows invalidated the eMudhra certificates by adding them to a separate "distrust" policy store, and this release ensures that Mailspring consults that list and well as the certificate trust chain when opening secure connections. Bug Fixes: - Fixed emails that declare a dark color scheme turning the message background black. (#2988) - Fixed the Back and Close buttons in account setup not responding to clicks. - The MCP server's reply_to_thread tool now loads the message body before quoting it. - On macOS, fixed the Darkside theme's window controls sticking to the top of the window. (#2984) Thanks @AlexandreAgrn! - Fixed calendar and contacts sync leaving a network connection open after every request, which piled up hundreds of open sockets per account over time. Thanks @Alintya.
Full release notes from the publisher
Manifest: manifests/f/Foundry376/Mailspring/1.26.2
1.26.1 · 2026-10-21 · 1 installer notes
| Architecture | Format | Scope | SHA-256 | Download |
|---|---|---|---|---|
| x64 (64-bit) | EXE | Per user | 8237e34904115bedbb5aa3d4a00aabe89af763fd7b19b5130b410b91607b2ef8 |
Download |
Pin this version: winget install --id Foundry376.Mailspring --version 1.26.1 --exact
Release notes
This is a security patch release. It updates Electron to 44.9.1, which distrusts eight eMudhra intermediate certificates whose private keys were compromised. An attacker holding one of those keys could impersonate any mail server or website. (https://emudhra.we-have-a-problem.com/) Security: - Updated Electron to 44.9.1 to block the compromised eMudhra intermediate certificates. - On Linux, tray icons are converted with ImageMagick without going through a shell. (#2934) Bug Fixes: - Fixed Mailspring failing to start when the interface language is set to Luxembourgish. (#2954) Thanks @brhellman! - Fixed a composer crash when a list item has no list around it. (#2813) - Sending a draft now retries the draft lookup once before reporting "draft not found". (#2848) - On Wayland, Mailspring now restores the saved window size. (#2961) Thanks @shanelord01! - An empty key list in keymap.json now unbinds a command. (#2950) Thanks @brhellman! Localization: - Updated German translations. (#2976) Thanks @Alintya! Developer: - Account-test errors from the sync engine are now reported to Sentry as separate issues. (#2843)
Full release notes from the publisher
Manifest: manifests/f/Foundry376/Mailspring/1.26.1
1.26.0 · 2026-10-02 · 1 installer notes
| Architecture | Format | Scope | SHA-256 | Download |
|---|---|---|---|---|
| x64 (64-bit) | EXE | Per user | 5fb1200aa0104a6108f0042aeaa25d2a3f441f80793f88cb8757d7a553fee282 |
Download |
Pin this version: winget install --id Foundry376.Mailspring --version 1.26.0 --exact
Release notes
1.26.0 (10/1/2026) This is a major sync reliability release - The sync engine now tracks every folder a message lives in, rather than forcing each message into a single folder. This permanently fixes mail "flickering" between folders or disappearing from the Inbox when the same message exists in two places — a long-standing issue for iCloud users, self-addressed mail that lands in both Inbox and Sent, Exchange's duplicate Sent copies, and ProtonMail labels. (#2891) This refactor was enabled by a huge new suite of automated mailsync tests that run against real Dovecot, Cyrus in Docker and fake problematic IMAP servers. Features: - Folder and unread counts left wrong by previous versions are repaired automatically on upgrade. Thanks @dansleboby! - Calendars now refresh every 15 minutes instead of every 45, so invitations accepted on another device or meetings moved by the organizer show up sooner. Contacts sync slightly less often to conserve Google API quota. Thanks @brhellman! - After an event is saved or deleted, Mailspring re-reads the calendar from the server so the event reflects what the server actually stored. (#2915) Thanks @brhellman! - Calendars deleted or unshared on the server are now removed from Mailspring along with their events. Thanks @brhellman! - Mailspring now records whether each calendar is your own or shared with you, so RSVPs are never written onto someone else's calendar. (#2916) Thanks @brhellman! - Day and week calendar views now draw events with…
Full release notes from the publisher
Manifest: manifests/f/Foundry376/Mailspring/1.26.0
1.25.0 · 2026-09-19 · 1 installer notes
| Architecture | Format | Scope | SHA-256 | Download |
|---|---|---|---|---|
| x64 (64-bit) | EXE | Per user | ebdddf7635531d89d81fd92b23d8f6bbda62c462c4d2229f433f65e6c22b126b |
Download |
Pin this version: winget install --id Foundry376.Mailspring --version 1.25.0 --exact
Release notes
1.25.0 (9/19/2026) Features: - The Activity panel has been redesigned around three tabs: a new Feed tab lists every open and click with search, filtering, grouping by recipient or message, collapsing of repeated events and CSV export; a new Engagement tab ranks your recipients by how much they open and click your mail; and Reports has a new design with more charts. - Added a "Go to Unread" navigation command (g u in the Gmail shortcut set), listed under View in the menu bar and rebindable from Preferences > Shortcuts. - On macOS, the base theme now matches the macOS 27 toolbar and window styling. Security: This version includes several patches for security vulnerabilities and is recommended for all users. Thanks 홍서연 at ENKI WhiteHat for detailed investigation and reporting. Bug Fixes: - Fixed initial sync silently dropping messages on servers that advertise CONDSTORE and QRESYNC (FastMail, Dovecot, Zoho and others). Only the first 1024 messages of each 5000-message chunk were ingested. - Fixed QRESYNC VANISHED handling that could unlink an entire folder's messages or drop expunges permanently on CONDSTORE+QRESYNC servers. - Fixed a crash loop when an IMAP server or gateway (DavMail, Proton Bridge, Zoho) lists the same mailbox twice. - Fixed Inbox and Sent appearing empty, with messages flickering between folders, on non-Gmail accounts that expose an \All mailbox. Messages that exist in both Inbox and Sent now consistently resolve to one folder. - Fixed SMTP connections…
Full release notes from the publisher
Manifest: manifests/f/Foundry376/Mailspring/1.25.0
1.24.1 · 2026-09-15 · 1 installer notes
| Architecture | Format | Scope | SHA-256 | Download |
|---|---|---|---|---|
| x64 (64-bit) | EXE | Per user | 0122003f943ccfaabbc8aabc7a7610eb773d37e8b29fd2c50e4a565ebc0dc190 |
Download |
Pin this version: winget install --id Foundry376.Mailspring --version 1.24.1 --exact
Release notes
On Linux, Mailspring 1.24.1 fixed accounts being lost after upgrading when the KWallet secret name changed. Mailspring now falls back to the previous secret storage key and re-saves credentials. (#2864) Thanks @LinusDierheimer! Features: - Added "Mark All as Read" to the folder context menu, and an option to show unread counts for all folders. Thanks @AnsCodeLab! - New drafts in a unified inbox now default to the account of the focused thread. Thanks @AnsCodeLab! - Added a MessageActionMenuItem extension point so plugins can add items to the message "..." menu. Thanks @AnsCodeLab! Bug Fixes: - Fixed mail rules breaking when a folder's ID changed right after it was created. Rules now match folders by name when the match is unambiguous. - Fixed the sidebar not switching from "Drafts" to "Activity" and other perspectives with the same layout. - Fixed reminders created in the draft UI missing the last reply timestamp, so they never fired. - Uploading a new signature image no longer overwrites the previous image on Mailspring's servers. Previously, replacing a signature image changed the image in emails you had already sent, and teams sharing a Mailspring ID could overwrite each other's default signature images. - On Windows, composer and thread popout windows no longer show a second title bar beneath the native one; press Alt in those windows to show the menu bar. Thanks @ejbiker93ss! - On Windows, the system tray icon is no longer blurry at 125% / 150% and other fractional…
Full release notes from the publisher
Manifest: manifests/f/Foundry376/Mailspring/1.24.1
1.24.0 · 2026-09-13 · 1 installer notes
| Architecture | Format | Scope | SHA-256 | Download |
|---|---|---|---|---|
| x64 (64-bit) | EXE | Per user | 920a0b72cd8f988f53b8e0d4255430d6e3de346263838133133036c2bbd0a33d |
Download |
Pin this version: winget install --id Foundry376.Mailspring --version 1.24.0 --exact
Release notes
1.24.0 (9/12/2026) Note: The Flatpak version of Mailspring now uses Portal for secret storage, and you may be prompted to re-authenticate accounts after upgrading. Note: Mailspring now requires macOS 13 (Ventura) or later, because Chromium has dropped support for macOS 12. Windows and Linux system requirements are unchanged. Features: - Added support for dragging threads into the composer to attach them as .eml files. (#2800) - Added subject line support to email templates. (#2794) - In the calendar, dragging an event now converts between all-day and timed. (#2819, #2812) Thanks @manilabui! - Added an MCP get_attachment tool so local agents can view mail attachments. (#2807) Thanks @ahmedwalid05! - On Windows, Mailspring now recovers from GPU-related renderer crashes that happen before the window loads by relaunching with hardware acceleration disabled. Thanks @ejbiker93ss! Bug Fixes: - Mailspring now falls back to legacy TLS settings when the handshake is rejected, and surfaces a suggestion when it does. (#119) - Fixed crash safety, XML escaping, and log hygiene issues in the sync engine. (#122) Thanks @brhellman! - Fixed synchronization with NetEase IMAP servers. (#121) Thanks @aixia715! - Fixed recurring meetings whose series started years ago not appearing in the calendar. (#2845) Thanks @brhellman! - On Linux, EROFS, EIO, ENOSPC, and EBADF are now swallowed alongside EPIPE in the stdout/stderr error handler. (#2789) - Plain text messages are no longer inverted in dark…
Full release notes from the publisher
Manifest: manifests/f/Foundry376/Mailspring/1.24.0
1.23.0 · 2026-07-22 · 1 installer notes
| Architecture | Format | Scope | SHA-256 | Download |
|---|---|---|---|---|
| x64 (64-bit) | EXE | Per user | 0b4e511fe881f8202cc75f0c461c7bdc666f8d87b25dae6137740384e2e00f76 |
Download |
Pin this version: winget install --id Foundry376.Mailspring --version 1.23.0 --exact
Release notes
1.23.0 (7/19/2026) Features: - Added Office 365 shared mailbox support. (#2763) Thanks @Kevin-Hamilton! - Added the ability to export folders to mbox files. (#2765) Thanks @Kevin-Hamilton! - Added an option to count unread messages across all accounts. (#2779) Thanks @WebDevBar! - Added a toggle for email render mode. (#2737) Thanks @AidanWarner97! - Added an MCP server (off by default) that lets local agents interact with mail. - On Linux, added a taskbar unread badge for KDE and other non-Unity desktops. (#2756) Thanks @WebDevBar! Bug Fixes: - Fixed a composer crash on quoted emails with inline images. (#2776) - Fixed a composer crash when grammar-check decorations apply mid-composition. (#2775) - Fixed missing Slate attributes on the IMAGE_TYPE fallback node. (#2774) - Fixed a composer cut crash and suppressed Sentry noise from third-party plugins. (#2755) - Fixed a crash when dragging threads to the sidebar after a thread is deleted. (#2760) - Fixed a crash in EventRSVPTask when attendee ICS data goes stale. (#2770) - Fixed a crash in the translation plugin when the iframe contentDocument is not yet loaded. (#2752) - Fixed an onboarding crash when back-navigation empties the page stack. (#2750) - Fixed navigator.clipboard.writeText in @electron/remote MenuItem handlers. (#2754) - Fixed an ERR_FILE_NOT_FOUND crash in Show Original when the RFC822 fetch fails. (#2772) - Fixed null crashes in SendDraftTask, thread-sharing, and send-and-archive. (#2757) - Fixed a null crash…
Full release notes from the publisher
Manifest: manifests/f/Foundry376/Mailspring/1.23.0
1.22.0 · 2026-06-13 · 1 installer notes
| Architecture | Format | Scope | SHA-256 | Download |
|---|---|---|---|---|
| x64 (64-bit) | EXE | Per user | 30637325ac0e266e1d0c8f27287d7b99247d9ecd7c542da6ffe262e0e8fad655 |
Download |
Pin this version: winget install --id Foundry376.Mailspring --version 1.22.0 --exact
Release notes
Features: - Added the ability to choose which themes apply in automatic light/dark mode. (#2732) Thanks @Jayphen! Bug Fixes: - Fixed null crash when clicking "Send now" on undo-send toast after the message had already been sent. (#2738) - Fixed two null-access crashes reported in Sentry (MAILSPRING-CLIENT-1G, MAILSPRING-CLIENT-18, MAILSPRING-CLIENT-2V). (#2740) - Fixed two Sentry crashes: null account in preferences and null window in app menu IPC. (#2741) - Fixed crash when archiving from search with label-based archive categories. (#2743) - Fixed null crash when removing threads with unsynced trash/archive category. (#2736) - Fixed Outlook account setup. (#2735) Thanks @Suchiman! - Fixed Windows print crash caused by invalid file URL. (#2733) - Fixed TOCTOU null-reference crash in draft body setter (MAILSPRING-CLIENT-S). (#2728) - Fixed DefaultClientHelperMac passing boolean to error callback, causing false Sentry reports. (#2731) - Fixed AttributeDateTime.fromJSON treating 0/falsy values as missing. (#2730) - Fixed quickpreview CSP clobbering the default session's app-wide CSP. (#2744) Thanks @dansleboby! - Fixed QuerySubscription._fetchRange contiguity check using actual result length. (#2734) - On Windows, fixed EPERM crash when forking background query agent. (#2745) Improvements: - Improved Microsoft OAuth: better email resolution and suppressed no-mailbox errors from Sentry. (#2746) - Added diagnostics around "draft not found" error on send and cleaned up waiting…
Full release notes from the publisher
Manifest: manifests/f/Foundry376/Mailspring/1.22.0
1.21.1 · 2026-05-20 · 1 installer notes
| Architecture | Format | Scope | SHA-256 | Download |
|---|---|---|---|---|
| x64 (64-bit) | EXE | Per user | 22c359509c07e015b11c71cef0e997deff6fd728ce4e97a216ea4c8f659ab957 |
Download |
Pin this version: winget install --id Foundry376.Mailspring --version 1.21.1 --exact
Release notes
Performance: - Optimized search regex compilation in category and label pickers. (#2715) - Improved sync engine performance by reducing unnecessary SQLite writes and moving parsing outside transactions. Bug Fixes: - Improved theme support in calendar - Fixed dark mode email bodies not reflecting the system tint color. - Fixed activeMarks access errors in the composer editor. (#2714) - Fixed thread list scroll indicator not sliding through time when dragging the scroll handle. (#2716) - Fixed contains error when parentFilter receives a non-Element node. (#2712) - Fixed secrets potentially appearing in the connection error detail modal. (#2717) - Fixed package name validation rejecting names with uppercase letters. (#2718) - Fixed sync engine crash during many-account sync by increasing SQLite busy timeout. - Fixed message importance headers not normalized for compatibility with some providers. (mailsync#113) - Improved error logging for empty or malformed error objects. (#2713) Developer: - Upgraded Electron from 41.5.0 to 41.6.1. - Upgraded React and React DOM to v17. (#2725) - Upgraded react-transition-group from 1.2 to 4.4.5. - Replaced deprecated componentWillMount with componentDidMount. (#2724) - Replaced legacy context API with React Context. (#2722, #2723) - Refactored class components to functional components with React.memo. (#2720) - Removed PropTypes, replaced with TypeScript types. (#2710) - Added missing TypeScript types to function declarations across many…
Full release notes from the publisher
Manifest: manifests/f/Foundry376/Mailspring/1.21.1
1.21.0 · 2026-05-06 · 1 installer notes
| Architecture | Format | Scope | SHA-256 | Download |
|---|---|---|---|---|
| x64 (64-bit) | EXE | Per user | dc17548bd5fc5aa0a3ea7c4ea723e58ce69fba9cd050ed104baaf8e822c0a4c6 |
Download |
Pin this version: winget install --id Foundry376.Mailspring --version 1.21.0 --exact
Release notes
Features: - Added Reply-To field to the composer header, allowing you to specify a different reply address when composing messages. (#2691) Thanks @Argjend12345! - Added bulk RFC2822 message export functionality to the sync engine. (#107) Bug Fixes: - Fixed HTTP/2 framing errors that could crash the sync engine during metadata streaming. (#103) - Prevented global keyboard shortcuts from firing when focus is in the composer. (#2693) - Strictly validate accent color hex values from system preferences to prevent errors. (#2692) Claude Security Audit: - Tightened validation to prevent file:// URIs in email content. (#2699) - Limited path traversal in protocol handler. (#2700) - Added allowlist validation for IPC window and webcontents methods. (#2701) - Improved HTML sanitization in the composer when pasting content. (#2702) - mailto links no longer support the ?attach= query parameter. (#2703) - Improved attachment name sanitization for security and compatibility. (#2705) - Improved email sanitization to block CSS @import tracking vectors. (#2706) - Added package name validation to prevent path traversal attacks. (#2698) - Added URL validation to the autoupdate handler. (#2697) - 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. (#105) Developer: - Migrated build…
Full release notes from the publisher
Manifest: manifests/f/Foundry376/Mailspring/1.21.0
1.20.1 · 2026-04-20 · 1 installer notes
| Architecture | Format | Scope | SHA-256 | Download |
|---|---|---|---|---|
| x64 (64-bit) | EXE | Per user | 06984cc4987f424c9eec71c10642308e54fe91db2ec3f4b25e8bcd44011c65a0 |
Download |
Pin this version: winget install --id Foundry376.Mailspring --version 1.20.1 --exact
Release notes
Fixes: - Resolves an issue with the inline composer's key handling that could cause Gmail-style shortcuts to activate while you were typing into the subject line or recipients.
Full release notes from the publisher
Manifest: manifests/f/Foundry376/Mailspring/1.20.1
1.20.0 · 2026-04-19 · 1 installer notes
| Architecture | Format | Scope | SHA-256 | Download |
|---|---|---|---|---|
| x64 (64-bit) | EXE | Per user | 39d1e2e990bf86ea51dedf5e5ee649a8df1a60993418adf4eb79e5f7df2e0bd0 |
Download |
Pin this version: winget install --id Foundry376.Mailspring --version 1.20.0 --exact
Release notes
Features: - Added an "Automatic" theme (the new default) that follows system light/dark mode. - Added system accent color support — the standard light and dark themes now use your OS accent color by default and this can be disabled from Preferences > Appearance. (#2682) - Improved the UX around creating folders and labels in the left sidebar - it's much easier to create nested items. (#2655) - A new "•••" menu on items in the left sidebar makes features (including the new EML export option) more discoverable. - Added EML export functionality for messages and folders. You can save selected messages as EML by right-clicking or from the app's menu, and export entire folders by right clicking in the left navigation. (#2652) Improvements: - Improved password storage error handling and reporting. (#2669) - Fixed a race condition causing Windows notification "Archive" and "Mark as Read" buttons to be unreliable. - Added Microsoft Office 365 / Outlook account setup guidance and troubleshooting documentation. (#2656) - Replaced text symbols with SVG icons in the toolbar. (#2658) - Refinements to EML export task in the sidebar. - Fixed the Wayland app_id after Electron 41 (Thanks @ReillyBrogan!) Bug Fixes: - Fixed an undefined @font-weight-semi-bold error in the ui-less-is-more theme. (#2684) - Fixed a crash in quick preview when the capture window is destroyed. (#2671) - Fixed an unhandled EPIPE error when writing to a dead mailsync process stdin. (#2673) - Fixed race conditions in…
Full release notes from the publisher
Manifest: manifests/f/Foundry376/Mailspring/1.20.0
1.19.1 · 2026-04-07 · 1 installer notes
| Architecture | Format | Scope | SHA-256 | Download |
|---|---|---|---|---|
| x64 (64-bit) | EXE | Per user | 1ea52aaf446683ef041db68056bf8ecfad3e115117404651afc0726fedfa7aa0 |
Download |
Pin this version: winget install --id Foundry376.Mailspring --version 1.19.1 --exact
Release notes
Bug Fixes: - On Windows, fixed notification click handling and removed a redundant window display call. (#2648) - Fixed the custom port input not updating in IMAP onboarding. (#2646) - Fixed VoiceOver handling on email composer token inputs (To, CC, BCC, etc.). Improvements: - Additional accessibility improvements: arrow key navigation and roving tabindex between messages in the message list, keyboard focus improvements in the account sidebar, email frame ARIA target for read-all support, and focus management fixes for modals and preferences. - On Linux, added Wayland session detection and a fallback menu button for window managers that don't support the system tray. (#2647) - Improved handling of navigation keys (arrow keys, etc.) in the composer typing state. (#2644) Thanks @ejbiker93ss! - Improved contact details panel styling. - On Linux/Wayland: frameless windows now display GTK drop shadows and support extended resize borders Developer: - Updated to Electron 41 (Chromium 146, Node.js 24.14), up from Electron 39 (Chromium 142, Node.js 22). (#2643) - Chromium updated from 142 → 146, bringing security patches and modern web standard support - Fixed white flash when opening app windows - Reduced GPU memory usage on macOS - On Windows: fixed a crash with UTF-8 file paths and a hang in native notification delivery - On macOS: fixed menu items incorrectly staying disabled after being re-enabled - On Windows: fixed window fullscreen state not being preserved correctly - On…
Full release notes from the publisher
Manifest: manifests/f/Foundry376/Mailspring/1.19.1
1.18.0 · 2026-02-23 · 1 installer notes
| Architecture | Format | Scope | SHA-256 | Download |
|---|---|---|---|---|
| x64 (64-bit) | EXE | Per user | ae0958e5de7d4c0cb9e2b09c7f5f032a2f092f99b9bab516d26120fb76e55fb2 |
Download |
Pin this version: winget install --id Foundry376.Mailspring --version 1.18.0 --exact
Release notes
Features: - Grammar check is now available in the composer! (#2612) - This feature relies on a deployment of LanguageTool at id.getmailspring.com - when you use Grammar Check, small snippets of your draft are sent to this server, but the requests are not logged and no message data is stored. - This feature is disabled by default. To turn it on, click the new icon in the composer toolbar. - Mailspring now properly detects "Do Not Disturb" status on MacOS Sequoia and on Windows. Bug Fixes: - On Wayland, the --background flag now shows the main window briefly then hides it, which is the best we can do under Wayland's rules. (#2623) - On Wayland, fixed a keyboard freeze in the composer caused by a double focus() call. (#2622) - Fixed sound notifications playing on Windows regardless of the notification preference. (#2619) - Fixed the tray icon theme detection on GNOME/Unity Linux desktops. (#2610) - Fixed a crash in vCard parsing when the VERSION line is not found. - Fixed an issue with the first CardDAV sync incorrectly seeing existing ETags in mailsync. - Fixed IMAP IDLE to process VANISHED notifications sent by FastMail (and possibly other providers). - Fixed folder priority logic that was incorrectly applied to non-iCloud accounts in mailsync. Improvements: - Added support for the stnadard biographies / notes field on contacts. (#2621) - Rearranged the thread context menu to reduce accidental destructive actions. (#2620) - Added an empty state to the calendar when no CalDAV…
Full release notes from the publisher
Manifest: manifests/f/Foundry376/Mailspring/1.18.0
1.17.4 · 2026-02-11 · 1 installer notes
| Architecture | Format | Scope | SHA-256 | Download |
|---|---|---|---|---|
| x64 (64-bit) | EXE | Per user | b68062857f3cce684cd4d35d1c0596c17c0a302891cc8f317ba1c3fb403fbb33 |
Download |
Pin this version: winget install --id Foundry376.Mailspring --version 1.17.4 --exact
Release notes
Features: - Added Agenda view to the calendar for chronological event browsing. (#2592) - Added Linux Do Not Disturb detection for notification suppression. (#2595) - Added Windows jump list and badge icon desktop integration. (#2594) - Added ARM64 (aarch64) Linux build support. (#2601) - The selected calendar view now persists across sessions. (#2600) Bug Fixes: - Fixed support for Wayland - window activation context is now handled gracefully. (#2599) - Fixed the app's system tray icon appearing as three dots (•••) at launch on Ubuntu 25. - Fixed summary notifications: broken Windows toast URLs and race condition. (#2597) - Improve Yandex account sync by ignoring their XLIST implementation, which is known to be buggy. - Fixed mutex re-entry locks during exception handling in mailsync that could be hit if a network disconnect caused both sync workers to throw at the same time. - Reverted IDLE error suppression that caused sync issues. Improvements: - On Linux, default to thin window framing with hamburger-style right menu. (#2604) - On Linux, added dark/light system tray icon support. (#2602) - Improved JS algorithm performance using Map/Set for better collection handling. (#2596) - Enabled support for custom config directory path. (#2587) Thanks @DerDemystifier! - Added missing release info in appdata. (#2586) Thanks @ychavoya! Developer: - Updated node-abi to 3.87.0 and added support for prebuilt better-sqlite3 binaries. (#2598) - Signed native .node addon files for Smart…
Full release notes from the publisher
Manifest: manifests/f/Foundry376/Mailspring/1.17.4
1.17.3 · 2026-01-31 · 1 installer notes
| Architecture | Format | Scope | SHA-256 | Download |
|---|---|---|---|---|
| x64 (64-bit) | EXE | Per user | b0a8d89867549719a5efe0e720804ac00acd130b75377831df7e8544da8fc679 |
Download |
Pin this version: winget install --id Foundry376.Mailspring --version 1.17.3 --exact
Release notes
- Updates the .deb package dependencies to address Ubuntu 25 (libtidy58 replaces libtidy5deb1) and Linux Mint 22 (libcurl4t64, libgtk-3-0t64 instead of libgtk-3-0) installation issues. - Fix issues sending email on Windows caused by missing SASL libraries in some scenarios. - Screenshot mode now blurs the content of your emails as well (Thanks @cheack!) - The Spanish - Latin America (es_419) translations have been verified (Thanks @MiguVT!) and we've used the latest LLMs to update machine translations in other language files that were many years old.
Full release notes from the publisher
Manifest: manifests/f/Foundry376/Mailspring/1.17.3
1.17.2 · 2026-01-24 · 1 installer notes
| Architecture | Format | Scope | SHA-256 | Download |
|---|---|---|---|---|
| x64 (64-bit) | EXE | Per user | 75b5249ac7b927a5b9f16227081a4cc45c23bdb6020074d5926abba70de86885 |
Download |
Pin this version: winget install --id Foundry376.Mailspring --version 1.17.2 --exact
Release notes
Features: - Calendar now includes a Day View for more detailed scheduling. (#2573) - Calendar events can now be edited and synced back to the server. Drag events to reschedule them, or double-click to edit details. (#2574) - Mailspring now supports one-click unsubscribe using email headers (RFC 2369/8058). When an email includes unsubscribe headers, a link appears to quickly unsubscribe. (#2576) Bug Fixes: - Fixed a race condition in category pickers (folder/label selectors) that caused the search input to lock up. (#2580) - Fixed composer input lag where Enter and Backspace keys sometimes required multiple presses. (#2578) - Fixed Office365 OAuth authentication issues caused by an origin header. (#2579) - Fixed RSVP calendar event handling bugs and improved RFC 5546/6047 compliance. (#2575) - Add missing mailsync dependencies to the Linux packages. We now dynamically link against curl, etc. and need these to be listed as Requirements. - Improve reliability of iCloud accounts by disabling QRESYNC, which is known to be incorrectly implemented by iCloud. Note: I /think/ this will fix the long-standing disappearing messages issue, at the expense of slightly slower sync of non-inbox folders. - Fixed network error handling during CardDAV/CalDAV discovery. - Fixed HTTP 406 errors during CardDAV/CalDAV discovery on Yahoo accounts. - Fixed in-reply-to header parsing on iCloud accounts where spam messages contain garbage values. - Fixed Yandex account sync error handling…
Full release notes from the publisher
Manifest: manifests/f/Foundry376/Mailspring/1.17.2
1.17.1 · 2026-01-15 · 1 installer notes
| Architecture | Format | Scope | SHA-256 | Download |
|---|---|---|---|---|
| x64 (64-bit) | EXE | Per user | 78133a0a1d6d7d30eb757c3a01b03b7888f6fa2f8e40ba0ee5f194ca320c1a98 |
Download |
Pin this version: winget install --id Foundry376.Mailspring --version 1.17.1 --exact
Release notes
Bug Fixes: - Keyboard navigation in Mailspring's thread list has been fixed! - On Fedora, the libtidy dependency is more broadly specified to support both soname versions (libtidy.so.5 or libtidy.so.58) We're aware of issues with Wayland support for some Linux users and are investigating how to handle these scenarios better, since Wayland became the default for Electron apps in September.
Full release notes from the publisher
Manifest: manifests/f/Foundry376/Mailspring/1.17.1
1.17.0 · 2026-01-14 · 1 installer notes
| Architecture | Format | Scope | SHA-256 | Download |
|---|---|---|---|---|
| x64 (64-bit) | EXE | Per user | 7afb1c52a41d5dbbf3a0ea2bd25f1eb3701f95484fbde1589e0b6832badb60f5 |
Download |
Pin this version: winget install --id Foundry376.Mailspring --version 1.17.0 --exact
Release notes
This is Mailspring's largest update in a while! This release includes significant security updates - Mailspring now uses the system-bundled sasl2, ssl, crypto and curl libraries on all Linux platforms, and the UI has moved to the latest version of Electron and many, many other dependencies. We've applied additional security patches, and the UI is faster than ever thanks to upstream improvements in Chromium. On Linux, Electron 39 also brings native support for Wayland. On Windows, this release resolves longstanding issues with spellcheck and adds support for rich toast notifications with inline actions. The "infinite sync bug" that impacted iCloud accounts has been fixed, and we reviewed and applied many other patches to Mailcore and libetpan to improve stability of email sync. The updates also add supprt for TLS Server Name Identification (SNI). Bug Fixes: - On Windows, the Start Menu integration has been updated for Windows 11 and the "default mail client" option now links directly to Mailspring's page in Windows Settings. - On Windows, mailto: link handling no longer breaks due to a launch argument parsing issue. - On Windows, spellcheck now works correctly by using the DOM spellcheck attribute with typing debounce. (#2535) - On macOS, Mailspring can now correctly create and delete the LaunchAgent file for launch on startup. (#2509) - On Linux, the tray icon no longer shares an ID with other Electron apps. (#2529) - On Linux, native Wayland support is now enabled in the…
Full release notes from the publisher
Manifest: manifests/f/Foundry376/Mailspring/1.17.0
1.16.0 · 2025-07-16 · 1 installer notes
| Architecture | Format | Scope | SHA-256 | Download |
|---|---|---|---|---|
| x64 (64-bit) | EXE | Per user | a446c311c415e17eeacd48b6307a91beed6b24ff1d8393fb34d1a238c87ce5a7 |
Download |
Pin this version: winget install --id Foundry376.Mailspring --version 1.16.0 --exact
Release notes
- Thunderbird-style Autoconfiguration (#2493) - Fix in-app previews for PDF attachments on Windows / Linux - Update and improve zh-TW Traditional Chinese locale (#2498) - Update Czech translation (#2500) - snap: Use core24 as base (#2497) - Change lsb-core-noarch to be an optional dependency in the RPM package. (#2503) - Fix a few misc application errors logged to our reporting service - Upgrade to Electron 37.2.2 - Chromium 138, V8 13.8, and Node.js 22.16 for faster JavaScript execution and better email rendering, native system context menus on Linux, and more!
Full release notes from the publisher
Manifest: manifests/f/Foundry376/Mailspring/1.16.0
All older versions: manifests/f/Foundry376/Mailspring
Mac versions
Homebrew casks list only the current release. Earlier builds appear in the cask’s history on GitHub, and Homebrew cannot install them directly.
1.26.2 latest · 2 installers
| Architecture | Format | Requires | File & source | SHA-256 | Download |
|---|---|---|---|---|---|
| Intel (x64) | ZIP | macOS 13+ | Mailspring.zipgithub.com | f2f4d26fd6613b2cd1b1434ebd018cbc073557de5034ef07ce1336b55d7dc27e |
Download |
| Apple silicon (ARM64) | ZIP | macOS 13+ | Mailspring-AppleSilicon.zipgithub.com | 4ca6a0d995e51583c2dc4c43bdccfb4a96ed61867f0e8e18486954ba55f83dce |
Download |
Release notes
Linux versions
Flathub lists only the current release, and Flatpak installs the newest build; earlier versions cannot be chosen from the listing.
Alternatives to Mailspring
Similar apps in Email clients on Everyversion. Each one links to the download location named in the publisher’s package data, with a SHA-256 checksum.
Mailspring FAQ
Is Mailspring safe to download from here?
We host no installers. Every download button goes to the download location named in the package listing, and the checks below were run on those files.
On 2026-11-07 we downloaded the latest 3 installers from those sources and re-computed the SHA-256 of each: 3 of 3 match the package catalog’s value. Code signatures: 1 valid, 2 not applicable (archives and similar).
VirusTotal: none of its 58 security engines flagged any of the 3 scanned files.
Reports exist for 3 of 4 files, so the rating does not cover the rest.
Our rating: Safe so far. No check is a guarantee. See the security details above and our Security and Trust Center. Publisher’s website: Mailspring’s official website.
Does Mailspring update itself after I install an old version?
For Windows, we have no information on whether Mailspring updates itself, and for Mac, the app is listed as updating itself, so an older build will likely offer, or simply install, the newest release when you open it. To keep an old version, look for an automatic-update setting in Mailspring (see Mailspring’s documentation) and turn it off before you rely on it.
Does Mailspring cost anything?
No. Mailspring is free and open source (license: GPL-3.0).
Which versions of Mailspring are listed here, and how far back?
For Windows, we list 38 versions, from 1.8.0 up to 1.26.2, and for Mac, only the current release (1.26.2) is listed, because older Mac builds are not kept in the package listing, and for Linux, we list 1 version, from 1.26.2 (2026-10-22) up to 1.26.2. This page shows the newest 20 Windows versions; the JSON and Markdown files for this app list all 38 Windows versions.
Where do the download links go?
They go straight to the source named in the package catalog, with nothing added by us: for Windows, to github.com, and for Mac, to github.com, and for Linux, to dl.flathub.org. We host no files. Compare the SHA-256 shown next to each file with the one you compute after downloading. Publisher’s website: Mailspring’s official website.