Fix missing Mail-Followup-To header in sent mail (#1489829)

Aleksander Machniak

2014-04-23 65ac8302e4d8fce7f5e3aa21332d78fcbd09e8b3

 program/steps/mail/sendmail.inc

@@ -201,7 +201,7 @@
    $headers['Mail-Reply-To'] = $headers['Reply-To'];
}
if ($hdr = rcube_utils::get_input_value('_followupto', rcube_utils::INPUT_POST, TRUE, $message_charset)) {
    $headers['Mail-Followup-To'] = rcmail_email_input_format();
    $headers['Mail-Followup-To'] = rcmail_email_input_format($hdr);
}

// remember reply/forward UIDs in special headers