Skip to content
Switch branches/tags

Latest commit


Git stats


Failed to load latest commit information.
Latest commit message
Commit time


Pigeon is an easy to use, hassle-free PHP microservice for sending e-mails via HTTP requests. It values simplicity above all, i.e. no database required, extremely easy and quick installation. It is intended for small, in-house projects that require e-mail sending capabilities.

Getting started

1. Prerequisites

You need PHP and a web server to run Pigeon. If you indent to use its SMTP funcionality, you will need composer and access to an SMTP server you can dispatch messages to.

2. Installing

Clone Pigeon's repository in document root of your web server (e.g. /var/www/):

git clone pigeon && cd pigeon

At this point Pigeon is already ready for use. It is relying on the existing e-mail infra-instructure of the machine, i.e. PHP's mail() function.

3. Installing SMTP dependencies (optional)

If you intend to use SMPT as a sending mechanism, you need to download a few dependencies. In the folder where you cloned Pigeon, run:

composer install

It will download and install everything you need.

4. Configuring

Pigeon has a default configuration file named config.php. In fact you don't have to configure anything to start using Pigeon, since it comes pre-configured and ready to use after instalation.

However the best practice is to create a local configuration file named config.local.php that overrides only the directives you want to change, e.g. increase security.

Go to the folder where Pigeon is and create your local configuration file:

cp config.php config.local.php

Next edit config.local.php with your needs, such as SMTP credentials, a prefix text for all messages, etc.

IMPORTANT: Pigeon does not use any authentication token by default, so any request will be served (and an e-mail be sent). It is highly recommended that you set a value for the AUTH_TOKEN directive in your config.local.php to password-protect your service.

If nothing else, ensure you have AUTH_TOKEN not empty in your config.local.php, like this:

define('AUTH_TOKEN', 'mysuperhardtoguesspassword');

Please check the config.php file for more configuration directives.


Assuming your Pigeon installation is available at http://localhost/pigeon, you can send e-mails by sending a POST or GET request containing the fields to, subject and text as follows:

curl -d " is coming!" http://localhost/pigeon

Pigeon will reply with a JSON reponse, e.g.


If you have configured the AUTH_TOKEN directive in your config.local.php file, you need to also specify a token param that matches your AUTH_TOKEN value for your request to be accepted.

Assuming AUTH_TOKEN is mysuperhardtoguesspassword, your e-mail request will be:

curl -d " is coming!&token=mysuperhardtoguesspassword" http://localhost/pigeon


Pigeon is by no means an enterprise grade microservice. It is not designed around security and there is no queue system in place, so e-mails are dispatched as they arrive. You can choke the web server by making lots of request at the same time. Requests hang the web server up for the duration of the e-mail sending process, which also consumes resources unnecessarily. Pigeon is a quick drop-in solution for small projects that just want to send e-mails, no questions asked.


Pigeon is licensed under the terms of the MIT Open Source license and is available for free.


See all changes in the CHANGELOG file.


Easy to use and hassle-free PHP microservice for sending e-mails via a REST API





No packages published