Admin Notice When an Email Fails to Send
Shows administrators a warning in the dashboard when WordPress could not send an email, with the error message, so delivery problems are noticed quickly.
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.
Daily Digest of Comments Awaiting Moderation
Replaces the one-email-per-comment moderation notices with a single daily email listing every comment waiting for approval, with a link to the moderation screen.
Daily Email Summary of New PHP Errors
Reads new lines in debug.log once a day and emails a short summary of fatal errors, warnings and notices with how often each occurred, so problems do not go unnoticed.