Very-Simple-SMTPS

Contents:

• About
• Features
• How to use
  • Conancenter
  • Download release
  • Example usage
• How to build
  • Scripts
  • Building
  • Testing
  • Example
  • Clean up
• SMTPS server providers
  • Amazon
  • Google

About:

A small library written in modern C++ that can be used to send emails with binary attachments.

Features:

SMTP authentication:

This library currently only supports the LOGIN/PLAIN SMTP authentication method which means you will need to supply your username and password for your email account when you're sending emails with this library.

How to use:

This library can be integrated into your project by using the conan package manager or by downloading a release and copying this library's code into your project.

Conancenter:

Add the following line into your conanfile.txt:

[requires]
very-simple-smtps/1.0.0

This package can be installed into the project with: conan install conanfile.txt --build=missing

More info can be found on the conan-center package page.

Download a release:

Grab the latest release from here.

You can build a release version of this library by following the instructions below.

Copy over the include folder into your own project and copy either the libsmtp_lib.so or libsmtp_lib.a library file that was built under .conan/src into your own project and link with it. Best of luck!

Example usage:

#include "attachment/attachment.hpp"
#include "email/email.hpp"

using namespace smtp;

int main(void) {
  EmailParams params{
      "gmail_account@gmail.com",         // smtp username
      "google_app_password",             // smtp password
      "smtps://smtp.gmail.com:465",      // smtp server
      "target@gmail.com",                // to
      "gmail_account@gmail.com",         // from
      "",                                // cc
      "Testing sending attachments",     // subject
      "Hey listen friend here are some attachments for you to play with!", // body
  };
  Email e{params};

  Attachment a{"mountain-beach.jpg"};
  Attachment a2{"mountain-beach2.jpg"};
  e.addAttachment(a);
  e.addAttachment(a2);

  e.send();

  return 0;
}

How to build:

Scripts:

The scripts below need to be run from the project root i.e ./Very-Simple-SMTPS

$ ./scripts/venv.sh     # Creates or starts the python virtual environment required to build and run tests
$ ./scripts/setup.sh    # Installs tools required to build and run this project
$ ./scripts/build.sh    # Builds the library
$ ./scripts/test.sh     # Runs the tests
$ ./scripts/cleanup.sh  # Removes build artifacts

Build profiles:

This library can be built in either release mode or debug mode and can be built as a shared or static library.

To switch between shared or static builds, the build profiles under ./profiles can be modified by setting the shared variable under [options] to False or True.

The steps below will show you how to build in either debug or release mode.

Building:

• [Optional] Consider running the ./scripts/setup.sh script to install tools required for building.
• To build, this project relies on the conan package manager and meson.
• The virtual environment needs to be created and the user needs to have activated this virtual environment before this library can be built.

# create or activate python virtual env
$ source ./scripts/venv.sh

# build the library and tests in DEBUG mode by default
$ ./scripts/build.sh

# build the library and tests in RELEASE mode
$ ./scripts/build.sh release

Testing:

• The unit testing framework used is doctest
• To run the tests:

$ ./scripts/test.sh

Example:

• There is an example of how to send an email with attachments under ./examples/send_attachments.cpp
• Fill in the credentials and you should be good to go!
• To run the example:

$ ./.conan/examples/examples

Clean up:

• Remove all build artifacts:

$ ./scripts/cleanup.sh

SMTPS server providers:

Amazon SES:

• This library has been tested against Amazon SES's SMTPS servers.
• Sender and receiver email addresses do need to be registered and verified in the AWS SES product.
• One of the many SMTPS servers: smtps://email-smtp.ap-southeast-2.amazonaws.com:465

Google:

• Google doesn't seem to allow access to less secure apps anymore.
• To use Google's SMTPS server, two step verification needs to be enabled on the Gmail account.
• Once this has been enabled, we can create an App password.
• This password will be used as the SMTP password.
• The SMTP username is the Gmail address.
• SMTPS server: smtps://smtp.gmail.com:465