A PHP email creation and transport class featuring file attachments, SMTP servers, CCs, BCCs, HTML messages, word wrap, and more. Sends email via sendmail, PHP mail(), QMail, or with SMTP.
PHPMailer is used by many popular PHP development frameworks and is one of the most popular email-generating and sending libraries in the world.
This project is defunct here on sourceforge - it's now maintained on Github at https://github.com/PHPMailer/PHPMailer.
Documentation is available at http://phpmailer.worxware.com/
Buggy and not developed on for years. Also their project maintenance is ... well ... what maintenance?
Seems to be abandoned. Documentation site is down, no support at all