program/include/rcube_smtp.php
@@ -195,6 +195,13 @@ return false; } // RFC2298.3: remove envelope sender address if (preg_match('/Content-Type: multipart\/report/', $text_headers) && preg_match('/report-type=disposition-notification/', $text_headers) ) { $from = ''; } // set From: address if (PEAR::isError($this->conn->mailFrom($from))) {