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-rw-r--r--program/steps/mail/func.inc2
1 files changed, 2 insertions, 0 deletions
diff --git a/program/steps/mail/func.inc b/program/steps/mail/func.inc
index f14c532b4..b1ce4bd4e 100644
--- a/program/steps/mail/func.inc
+++ b/program/steps/mail/func.inc
@@ -1435,6 +1435,8 @@ function rcmail_deliver_message(&$message, $from, $mailto)
$sent = mail($headers_enc['To'], $headers_enc['Subject'], $msg_body, $header_str, "-f$from");
}
+ if ($sent) // remove MDN headers after sending
+ unset($headers['Return-Receipt-To'], $headers['Disposition-Notification-To']);
$message->_headers = array();
$message->headers($headers);