Email Alert When Key Site Settings Change
Emails the site admin when important settings change, such as the site address, admin email, open registration or the default role for new users, a common sign of a hacked site.
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.
Sign Outgoing Emails With DKIM
Adds a DKIM signature to every email using a private key file and settings stored in wp-config.php, so receiving servers can verify your messages.
Stop "Site Admin Email Changed" Notifications
Prevents the email sent to the old address when the site's administration email address is changed in Settings > General.