How many emails can you send per day with Gmail?

Gmail user Stephen Black recently needed to send emails in bulk to his acquaintances and friends (a large number of people) to inform them about a movie he had acted in. However, when sending the emails, he received the following notifications (translated):

- Limit of 500 emails per day

- If you are sending a large number of undeliverable emails, your account may be suspended. Your account will return to normal after an unspecified period of time.