[Exim] What happens next?

Hi,

I was wondering what happens when I send a mail to myself such that the
message exceeds the total quota allocated to my box. This obviously
generates an error message and if my box at that point in time is full, the
error message that is generated will again give rise to another and hence
there is a cascade of error messages.

Can anyone tell me from their experience, how exactly exim behaves in this
case.

Thanks
vikas