Sending email using the Solar Framework is not only extremely simple but very flexible as well. Solar splits the process of sending email into 2 logical parts, creating the message "package" and sending the "package"

He includes a code example of using the Solar_Mail package to create and send an email with a text section, a HTML component and an image attachment. There's also a few lines dedicated to the Solar_Mail_Transport component and how you can use it directly with PHP's mail function.