Fixed mail to group issue

diff --git a/wcfsetup/install/files/lib/acp/form/UserMailForm.class.php b/wcfsetup/install/files/lib/acp/form/UserMailForm.class.php
index 1cf87cf82023ba52d462e476c8063961c4a3610f..8773b7bf632abe0fcff875b8ef254788b17b048a 100755 (executable)
--- a/wcfsetup/install/files/lib/acp/form/UserMailForm.class.php
+++ b/wcfsetup/install/files/lib/acp/form/UserMailForm.class.php
@@ -137,7 +137,7 @@ class UserMailForm extends AbstractForm {
                $userMailData[$mailID] = array(
                        'action' => $this->action,
                        'userIDs' => $this->userIDs,
-                       'groupIDs' => implode(',', $this->groupIDs),
+                       'groupIDs' => $this->groupIDs,
                        'subject' => $this->subject,
                        'text' => $this->text,
                        'from' => $this->from,