Great tutorial on the WordPress email system that walks users through setting up a plugin, creating an email template, preparing WordPress to use that email template, and modifying existing system emails. If that tutorial has you thinking that it’s too much work, you can take a look at the WP Better Emails plugin.
- WordPress Dev Chat For 7-15-09
- Supported Legacy Branches For WordPress.org?
- WordPress Dev Chat For 2-04-10