incoming message size quota

[Varga Robert]

I have to related questions:

1. How do I set the maximal incoming message size? And if is possible,
then the maximal outgoing message size?

2. What happens when the user's hard system quota is passed over with the
incoming message? Does the message bounce, or goes to temporary, or the
user gets it? I ask this with normal users not virtual users.

Robert Varga