Follow-Up Email a Few Days After Sign-Up
Sends new users a second, friendly email a few days after they register, with tips or links to get started, scheduled automatically with WP-Cron.
Snippet Library
Email snippets for WordPress
Snippets for the emails WordPress sends: change the sender name and address, add a Reply-To header, send HTML email and turn off notifications you do not need. For site owners who want their messages to arrive and look right.