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Mailpit 1.33.1

An email and SMTP testing tool with API for developers

filecart Windows Updated Nov 09, 2026
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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Mailpit was originally inspired by MailHog which is no longer maintained and hasn't seen active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.

License: MIT
Release info Update on Nov 07, 2026
Release notes Chore
• Resolve the latest message ID in a single helper
• Update Go dependencies
• Update node dependencies

Fix
• Parse address headers with non-UTF-8 display names (#763)
• Append missing recipients to an existing Bcc header
• Keep address parsing strict when decoding non-UTF-8 display names
• Guard against an empty Sender address list when releasing a message
• Reject messages that cannot be parsed instead of discarding them silently (#764)
• Return 400 for an invalid DELETE /api/v1/messages body (#766)
• Decode RFC 2231 attachment file names in non-UTF-8 charsets (#767)
• Accept latest as the ID in the release and thumbnail endpoints (#768)
• Limit the number & total size of remote stylesheets fetched by HTML check (Kiseob Hong @Minerv4)

Test
• Enhance thumbnail tests for latest ID handling and add empty case
Related tags email-testing go golang mailpit pop3-server
Listing datawinget

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