The Swift Mailer module extends the basic e-mail sending functionality provided by Drupal by delegating all e-mail handling to the Swift Mailer library. This enables your site to take advantage of the many features which the Swift Mailer library provides, such as :

• Support for sending e-mails directly through a SMTP server of your choice, a locally installed MTA agent such as sendmail or the mail functionality provided by PHP.
• Support for HTML e-mails.
• Support for file attachments.
• Support for inline images.

The module also lets you theme e-mails so that they reflect the general look and feel of your site and at the same time appear correctly in various e-mail browsers. Images required by the theme can be attached to the e-mail and displayed inline.

The Swift Mailer module depends on the mailsystem module. This module is responsible for actually making the Swift Mailer module available to Drupal.