Remind Authors About Old Drafts
Once a week, emails each author a list of their drafts that have not been touched for a month, with edit links, so good ideas do not get forgotten.
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.
Remove the X-Mailer Header From Emails
Stops outgoing emails announcing "PHPMailer" and its version in the X-Mailer header, which reveals details about your server and can count against you in spam filters.
Stop Auto-Update Success Emails
Silences the emails sent after successful automatic updates of WordPress, plugins and themes. Emails about failed core updates are kept.
Stop Comment Notification Emails
Stops WordPress from emailing post authors about new comments and moderators about comments awaiting approval.