PHPMailer 5.2.9

Major changes:

• The autoloader is no longer autoloaded automatically, and the PHPMailer class does not require the SMTP class explicitly, so you must either load the autoloader yourself (as all the docs and examples have done for the last year), or load the SMTP class yourself. This fixes the inability to substitute your own SMTP subclass, and also improves interoperability with other autoloaders.
• Support for data-uri images
• Debug output handling improved in SMTP
• You can now supply your own callable for debug output
• Avoid PCRE infinite recursion in some PCRE versions
• Consistency improvements
• Cleaned up example code
  See the changelog for more details.

PHPMailer 5.2.8

Major changes:
Better RFC adherence for timeouts, headers, encodings
Much faster SMTP
Return-path header is no longer set (it never should have been)
Better interaction with frameworks - paths and autoloaders
Lots more languages (now up to 39!)
HTML5-spec email validation
Fixes for older PHP versions