Sender (return path) ignored

Hi, since WP does not have a filter to set the Sender on PHPMailer, plugins usually filter the mailer to set $phpmailer->Sender internal value. This is important to set where the DSN (Delivery Status Notification) messages should be sent.

Since Post SMTP uses Zend, that values is not extracted and used, hence there is no way to set the Sender. In the past, setting the Return-Path header was a solution, but that header is no more regular if set by the sending server (hence PHPMailer ignore it).

Could you add a simple option to set the Sender? I assume even the Zend framework has support for it.

Thank you, Stefano.