The Multibyte Mail plugin replaces the wp_mail() function with one that tries to encode the usual email message headers that might contain 8-bit data. It should work well with the core WordPress code as well as any plugins, unless the plugin is sending out some unusual headers.
If you receive bounces for comments on articles with 8-bit (or multibyte) characters in their title (or in the name of the comment author), this plugin should prove helpful. (more…)