[Dovecot] Dovecot or postfix Quota

[Adrián Ribao Martínez]

Hello,
I'm a bit confused with the dovecot quota support. What is it for?
I thought postfix should be the one managing the quota. If I set up a quota in 
dovecot, does dovecot keep the messages size under certain limit?
What happen when you reach the quota limit?
What's the difference between postfix quotas and dovecot quota?
I'm confused about this.

Thank you!
-- 
Adrián Ribao Martínez
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