diff --git a/app/models/mail_cron.rb b/app/models/mail_cron.rb
index d68bca4..b5fd412 100644
--- a/app/models/mail_cron.rb
+++ b/app/models/mail_cron.rb
@@ -38,7 +38,7 @@ class MailCron
 
       if !email_user_id.blank?
 
-        @user = User.find(email_user_id)
+        @user = User.find(email_user_id) rescue nil
 
         @group_mail << @user.email if !@user.blank?