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Swift Mailer is a powerful component-based library for sending emails from PHP 5 applications. Swift Mailer integrates into any web app written in PHP 5, offering a flexible and elegant object-oriented approach to sending emails with a multitude of features. It’s made up of many classes and each of these classes can be grouped into a general component group which describes the task it is designed to perform. This Free PHP Mailer Library operates on servers running PHP 5.2 or higher.

Free Feature-rich PHP Mailer:

• Send emails using SMTP, sendmail, postfix or a custom Transport implementation;
• Support servers that require authentication and/or encryption;
• Protect from header injection attacks;
• Send MIME compliant HTML/multipart emails;
• Use event-driven plugins to customize the library;
• Handle large attachments with low memory use.
• http://swiftmailer.org/