Add a Reply-To Header to Outgoing Emails
Adds the site admin address as Reply-To on emails that do not set one, so replies to no-reply senders reach a real inbox.
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 Gmail Grouping Your Site's Emails Into Threads
Adds a unique reference header to every email so Gmail shows each notification separately instead of bundling emails with the same subject into one long conversation.