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.