Copy Admin Notification Emails to Slack
Posts the subject and the start of every email sent to the site admin address into a Slack channel, so the team sees new users, comments and alerts where they already work.
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.