Match the Return-Path to the From Address
Sets the envelope sender (Return-Path) of outgoing emails to the From address, which improves SPF alignment and deliverability on many hosts.
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.