Public | Automated Build

Last pushed: a year ago
Short Description
MailHog with wss:// fix
Full Description


Inspired by MailCatcher, easier to install.

  • Download and run MailHog
  • Configure your outgoing SMTP server
  • View your outgoing email in a web UI
  • Release it to a real mail server

Built with Go - MailHog runs without installation on multiple platforms.


MailHog is an email testing tool for developers:

  • Configure your application to use MailHog for SMTP delivery
  • View messages in the web UI, or retrieve them with the JSON API
  • Optionally release messages to real SMTP servers for delivery

Getting started

  1. Either:
  2. Configure MailHog, or use the default settings:
    • the SMTP server starts on port 1025
    • the HTTP server starts on port 8025
    • in-memory message storage


See MailHog libraries for a list of MailHog client libraries.

  • ESMTP server implementing RFC5321
  • Support for SMTP AUTH (RFC4954) and PIPELINING (RFC2920)
  • Web interface to view messages (plain text, HTML or source)
    • Supports RFC2047 encoded headers
  • Real-time updates using EventSource
  • Release messages to real SMTP servers
  • Chaos Monkey for failure testing
  • HTTP API to list, retrieve and delete messages
    • See APIv1 and APIv2 documentation for more information
  • HTTP basic authentication for MailHog UI and API
  • Multipart MIME support
  • Download individual MIME parts
  • In-memory message storage
  • MongoDB and file based storage for message persistence
  • Lightweight and portable
  • No installation required


mhsendmail is a sendmail replacement for MailHog.

It redirects mail to MailHog using SMTP.

You can also use MailHog sendmail ... instead of the separate mhsendmail binary.

Web UI


MailHog is a rewritten version of MailHog, which was born out of M3MTA.

Clone this repository to $GOPATH/src/ and type make deps.

See the Building MailHog guide.

Requires Go 1.4+ to build.

Run tests using make test or goconvey.

If you make any changes, run go fmt ./... before submitting a pull request.


Copyright ©‎ 2014 - 2016, Ian Kent (

Released under MIT license, see LICENSE for details.

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