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92 lines
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92 lines
5.1 KiB
Markdown
# Mailpit - email testing for developers
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[](https://goreportcard.com/report/github.com/axllent/mailpit)
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Mailpit is a multi-platform email testing tool & API for developers.
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It acts as both an SMTP server, and provides a web interface to view all captured emails.
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Mailpit is inspired by [MailHog](#why-rewrite-mailhog), but much, much faster.
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## Features
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- Runs entirely from a single binary, no installation required
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- SMTP server (default `0.0.0.0:1025`)
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- Web UI to view emails (formatted HTML, highlighted HTML source, text, headers, raw source and MIME attachments including image thumbnails)
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- Mobile and tablet HTML preview toggle in desktop mode
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- Advanced mail search ([see wiki](https://github.com/axllent/mailpit/wiki/Mail-search))
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- Message tagging ([see wiki](https://github.com/axllent/mailpit/wiki/Tagging))
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- Real-time web UI updates using web sockets for new mail
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- Optional browser notifications for new mail (HTTPS and `localhost` only)
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- Configurable automatic email pruning (default keeps the most recent 500 emails)
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- Email storage either in a temporary or persistent database ([see wiki](https://github.com/axllent/mailpit/wiki/Email-storage))
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- Fast SMTP processing & storing - approximately 70-100 emails per second depending on CPU, network speed & email size, easily handling tens of thousands of emails
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- SMTP relaying / message release - relay messages via a different SMTP server including an optional allowlist of accepted recipients ([see wiki](https://github.com/axllent/mailpit/wiki/SMTP-relay))
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- Optional SMTP with STARTTLS & SMTP authentication, including an "accept anything" mode ([see wiki](https://github.com/axllent/mailpit/wiki/SMTP-with-STARTTLS-and-authentication))
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- Optional HTTPS for web UI ([see wiki](https://github.com/axllent/mailpit/wiki/HTTPS))
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- Optional basic authentication for web UI ([see wiki](https://github.com/axllent/mailpit/wiki/Basic-authentication))
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- A simple REST API ([see docs](docs/apiv1/README.md))
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- Multi-architecture [Docker images](https://github.com/axllent/mailpit/wiki/Docker-images)
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## Installation
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The Mailpit web UI listens by default on `http://0.0.0.0:8025`, and the SMTP port on `0.0.0.0:1025`.
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Mailpit runs as a single binary and can be installed in different ways:
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### Install via Brew (Mac)
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Add the repository to your taps with `brew tap axllent/apps`, and then install Mailpit with `brew install mailpit`.
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### Install via bash script (Linux & Mac)
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Linux & Mac users can install it directly to `/usr/local/bin/mailpit` with:
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```bash
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sudo bash < <(curl -sL https://raw.githubusercontent.com/axllent/mailpit/develop/install.sh)
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```
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### Download static binary (Windows, Linux and Mac)
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Static binaries can always be found on the [releases](https://github.com/axllent/mailpit/releases/latest). The `mailpit` binary can extracted and copied to your `$PATH`, or simply run as `./mailpit`.
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### Docker
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See [Docker instructions](https://github.com/axllent/mailpit/wiki/Docker-images).
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### Compile from source
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To build Mailpit from source see [building from source](https://github.com/axllent/mailpit/wiki/Building-from-source).
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### Testing Mailpit
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Please refer to [the documentation](https://github.com/axllent/mailpit/wiki/Testing-Mailpit) of how to easily test email delivery to Mailpit.
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### Configuring sendmail
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Mailpit's SMTP server (by default on port 1025), so you will likely need to configure your sending application to deliver mail via that port. A common MTA (Mail Transfer Agent) that delivers system emails to a SMTP server is `sendmail`, used by many applications including PHP. Mailpit can also act as substitute for sendmail. For instructions of how to set this up, please refer to the [sendmail documentation](https://github.com/axllent/mailpit/wiki/Configuring-sendmail).
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## Why rewrite MailHog?
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I had been using MailHog for a few years to intercept and test emails generated from several projects. MailHog has a number of performance issues, many of the frontend and Go modules are horribly out of date, and it is not actively developed.
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Initially I tried to upgrade a fork of MailHog (both the UI as well as the HTTP server & API), but soon discovered that it is (with all due respect to its authors) poorly designed. It is in my opinion over-engineered (split over 9 separate projects), and performs very poorly when dealing with large amounts of emails or processing emails with an attachments (a single email with a 3MB attachment can take over a minute to ingest). Finally, the API transmits a lot of duplicate and unnecessary data on every browser request, and there is no HTTP compression.
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In order to improve it I felt it needed to be completely rewritten, and so Mailpit was born.
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