I have an employee who sends around 200 emails from a certain email id daily. i change the email account per 1000 emails. but recently in my new account after sending 30 emails the employee is not able to send more emails for 24 hours. The emails go out but immediately i get the message: This is an automatically generated Delivery Status Notification Delivery to the following recipient failed permanently. he is on a dynamic ip and clears his cookies regularly. does gmail store flash cookies or anything. Also how can i get around this? any clue would be appreciated.