Mailpit 1.32.0

An email and SMTP testing tool with API for developers

  • By Ralph Slooten
  • Open Source
  • Updated Oct 22, 2026
Download for Windows

About Mailpit

Mailpit is a small, fast, low memory, zero-dependency, multi-platform email testing tool & API for
developers.

It acts as an SMTP server, provides a modern web interface to view & test captured emails, and
includes an API for automated integration testing.

Mailpit was originally inspired by MailHog which is no longer maintained and hasn't seen active
development or security updates for a few years now.

What's new in 1.32.0

This release includes security fixes, so upgrading is strongly recommended.
A maliciously crafted image attached to an email could make the thumbnail generator (used by the web UI and API) spin in an infinite loop. The exif reader has been replaced with a minimal in-tree EXIF orientation reader that only reads the first block and never follows pointers.

This release also strips <base> and meta refresh tags from /view/{ID}.html output, and limits concurrent HTTP, SMTP and POP3 connections to 1000 each.

Due to timing, these security fixes have released together with new UI features in this release.

Security

  • Replace goexif with minimal EXIF orientation reader (GHSA-379p-g4f4-hq5h)
  • Strip base and meta refresh tags from /view/{ID}.html output
  • Limit concurrent SMTP, POP3 and HTTP connections to 1000 each

Feature

  • Autocomplete search suggestions and history (#745)
  • Open received email when clicking a browser notification (#747)

Chore

  • Add composite index on message_tags (ID, TagID) to keep inserts fast as the mailbox grows (#750)
  • Reject EXIF IFD0 offsets that overlap the TIFF header
  • Update Go dependencies
  • Update node dependencies

Fix

  • Resolve data races in mailbox stats broadcast, logger init and SMTP MaxRecipients

Test

  • Add JS tests for search suggestions and HTML sanitising
  • Add e2e Playwright UI testing
  • Add maximal APP1 and fill-byte cases for EXIF orientation reader

Full release notes »

Technical details

PublisherRalph Slooten
Version1.32.0
Release date2026-10-22
LicenseMIT
Installer typezip
Architecturex64, arm64
Package IDaxllent.mailpit

Install Mailpit from the command line

Install with Windows Package Manager
winget install --id=axllent.mailpit -e
Update to the latest version
winget upgrade --id=axllent.mailpit -e
Uninstall
winget uninstall --id=axllent.mailpit -e

email-testinggogolangmailpitpop3-serversmtp-relaysmtp-serversmtp-testing

Mailpit version history

  • 1.31.6
  • 1.31.5
  • 1.31.4
  • 1.31.3
  • 1.31.2
  • 1.31.1
  • 1.31.0
  • 1.30.7
  • 1.29.5

Frequently asked questions

Is Mailpit free?

Yes. Mailpit is free and open-source software released under the MIT license.

What is the latest version of Mailpit?

The latest version is 1.32.0, released on Oct 22, 2026.

Is it safe to download Mailpit?

The download button links to the official installer published on github.com, the same file Windows Package Manager installs. You can verify the downloaded file by comparing its SHA-256 checksum with 16915767a6c95dca569336e8f561f91cf355e9a33c57b91deedcc10a4bba7fd4.

Which Windows versions does Mailpit support?

Mailpit runs on Windows and is available for 64-bit (x64), ARM64 systems.

How do I uninstall Mailpit?

Open Settings › Apps › Installed apps, find Mailpit and select Uninstall. From the command line, run winget uninstall --id=axllent.mailpit -e.