id summary reporter owner description type status priority milestone component version severity resolution keywords cc focuses 22837 "WP Needs to Set ""Sender"" and ""Reply-To"" or DKIM/DMARC will not work using wp-mail (via PHPMailer)" kellogg9 "I notice that for DKIM to function (while using DMARC) correctly for outgoing mail the PHPMailer object needs to make sure the Sender and Reply-To fields match the ""From"" field otherwise the ""Return-Path"" header uses the server it is sending from causing a mismatch. When this happens DKIM fails authentication on the receiver side because it is not added to outgoing mail. I tried adding the reply-to and sender header manually to wp_mail() but it did not work. One had to do the following: Right now i have to manually modify the /wp-includes/pluggable.php file in the wp_mail() function to include: {{{ if (strlen($phpmailer->Sender)==0) { $phpmailer->Sender = $phpmailer->From; $phpmailer->AddReplyTo($phpmailer->From); } }}} This resolves the problem and DKIM works again. " defect (bug) new high Awaiting Review Mail 3.4.2 major needs-patch close 2nd-opinion