diff --git a/htdocs/core/actions_sendmails.inc.php b/htdocs/core/actions_sendmails.inc.php
index 7494f5a3668..3749b403469 100644
--- a/htdocs/core/actions_sendmails.inc.php
+++ b/htdocs/core/actions_sendmails.inc.php
@@ -427,9 +427,14 @@ if (($action == 'send' || $action == 'relance') && !GETPOST('addfile') && !GETPO
 				} else {
 					$langs->load("other");
 					$mesg = '<div class="error">';
-					if ($mailfile->error) {
+					if (!empty($mailfile->error) || !empty($mailfile->errors)) {
 						$mesg .= $langs->transnoentities('ErrorFailedToSendMail', dol_escape_htmltag($from), dol_escape_htmltag($sendto));
-						$mesg .= '<br>'.$mailfile->error;
+						if (!empty($mailfile->error)) {
+							$mesg .= '<br>'.$mailfile->error;
+						}
+						if (!empty($mailfile->errors) && is_array($mailfile->errors)) {
+							$mesg .= '<br>'.implode('<br>', $mailfile->errors);
+						}
 					} else {
 						$mesg .= $langs->transnoentities('ErrorFailedToSendMail', dol_escape_htmltag($from), dol_escape_htmltag($sendto));
 						if (!empty($conf->global->MAIN_DISABLE_ALL_MAILS)) {
diff --git a/htdocs/core/class/CMailFile.class.php b/htdocs/core/class/CMailFile.class.php
index b991b4542f9..f299ecf9a88 100644
--- a/htdocs/core/class/CMailFile.class.php
+++ b/htdocs/core/class/CMailFile.class.php
@@ -1008,16 +1008,16 @@ class CMailFile
 				try {
 					$result = $this->mailer->send($this->message, $failedRecipients);
 				} catch (Exception $e) {
-					$this->error = $e->getMessage();
+					$this->errors[] = $e->getMessage();
 				}
 				if (!empty($conf->global->MAIN_MAIL_DEBUG)) {
 					$this->dump_mail();
 				}
 
 				$res = true;
-				if (!empty($this->error) || !$result) {
+				if (!empty($this->error) || !empty($this->errors) || !$result) {
 					if (!empty($failedRecipients)) {
-						$this->error = 'Transport failed for the following addresses: "' . join('", "', $failedRecipients) . '".';
+						$this->errors[] = 'Transport failed for the following addresses: "' . join('", "', $failedRecipients) . '".';
 					}
 					dol_syslog("CMailFile::sendfile: mail end error=".$this->error, LOG_ERR);
 					$res = false;