MySMTP

MySMTP is an implementation of the SMTP RFC.

This project provides a basic SMTP client and an SMTP Relay to allow somone to send mails provided he or she has an Internet connection.

Features

Client features:

• Can connect ton any SMTP server (tested successfully with Gmail and Hotmail)
• Can use SSL with TLSv1 to encrypt the connection
• Handles login/password authentication if necessary

Server features:

• Relays mails via the Gmail SMTP
• Can accept multiple client connections at once
• Uses SSL

How-to-build

You can build directly the 2 binaries (client and server) with the build.sh script located at the root of this repository.

There is a DEBUG variant of this project. It provides useful log infos. You may disable it by removing the MYSMTP_DEBUG on top of the build script.

The SSL library is required, but a precompiled version is provided with this project.

How-to-run

• Client

You can use the client alone, and connect to whatever SMTP you want. The client has the following syntax:

./client <IP or host> <port> [ssl]
./client smtp.live.com 587 ssl

Here, we specified the Hotmail SMTP hostname smtp.live.com, it listens on port 587 and uses ssl. If the server doesn't require SSL, you can ommit the ssl parameter

• Server

You can start the SMTP relay with the following command:

./server <IP> <port>
./server 192.168.0.5 4567

Here we start an SMTP relay which will listen on IP 192.168.0.5 and uses the port 4567.

You can then connect to your relay with the client:

./client 192.168.0.5 4567