Google app engine - mail recipients limit?

Question

I know that each recipient counts toward the Recipients Emailed (billable) quota and I can't send to more than is my daily quota.

But is there a limit how many recipients can a single email have?

For example can a single email created and sent through App engine Mail api have 8000 recipients?

Answer 1

Is the daily limit still 500? In that case, I would assume that a single email to 8000 people counts as 8000 emails, and thus would not be sent.