What happens to emails that cause an Overlimit?

[Tantrumedia]

If we set an account to have a maximum of 10 emails per hour, and the user sends 24...
...what happens to the remaining 14 emails?

Do 10 get sent in the following hour... and then the final 4 in the next hour?

And if they send another 5 in that second hour, will this additional 5 get sent in the second or third hour with the final 4?

None of this is covered in any of the documentation I've read so far.

Thanks for any help.

 

[IgorG]

As far as I remember these 14 emails will be rejected with tempfail.

 

[Tantrumedia]

Could you expand upon what tempfail will cause to happen, specifically?
I would like to know if my clients emails will get stored and eventually get sent out, hour by hour... or if they'll have to re-send any 'failed' messages from their email software (Outlook / Thunderbird) again.
Many thanks!