diff --git a/htdocs/core/actions_sendmails.inc.php b/htdocs/core/actions_sendmails.inc.php
index 49de1529321..590c805b8aa 100644
--- a/htdocs/core/actions_sendmails.inc.php
+++ b/htdocs/core/actions_sendmails.inc.php
@@ -132,9 +132,9 @@ if (($action == 'send' || $action == 'relance') && ! $_POST['addfile'] && ! $_PO
 			$replyto = $_POST['replytoname']. ' <' . $_POST['replytomail'].'>';
 			$message = $_POST['message'];
 			$sendtobcc= GETPOST('sendtoccc');
-			if ($mode == 'emailfromproposal') $sendtobcc = (empty($conf->global->MAIN_MAIL_AUTOCOPY_PROPOSAL_TO)?'':$conf->global->MAIN_MAIL_AUTOCOPY_PROPOSAL_TO);
-			if ($mode == 'emailfromorder')    $sendtobcc = (empty($conf->global->MAIN_MAIL_AUTOCOPY_ORDER_TO)?'':$conf->global->MAIN_MAIL_AUTOCOPY_ORDER_TO);
-			if ($mode == 'emailfrominvoice')  $sendtobcc = (empty($conf->global->MAIN_MAIL_AUTOCOPY_INVOICE_TO)?'':$conf->global->MAIN_MAIL_AUTOCOPY_INVOICE_TO);
+			if ($mode == 'emailfromproposal') $sendtobcc .= (empty($conf->global->MAIN_MAIL_AUTOCOPY_PROPOSAL_TO) ? '' : (($sendtobcc?", ":"").$conf->global->MAIN_MAIL_AUTOCOPY_PROPOSAL_TO));
+			if ($mode == 'emailfromorder')    $sendtobcc .= (empty($conf->global->MAIN_MAIL_AUTOCOPY_ORDER_TO) ? '' : (($sendtobcc?", ":"").$conf->global->MAIN_MAIL_AUTOCOPY_ORDER_TO));
+			if ($mode == 'emailfrominvoice')  $sendtobcc .= (empty($conf->global->MAIN_MAIL_AUTOCOPY_INVOICE_TO) ? '' : (($sendtobcc?", ":"").$conf->global->MAIN_MAIL_AUTOCOPY_INVOICE_TO));
 
 			$deliveryreceipt = $_POST['deliveryreceipt'];