quota-status fails when size=0 from Postfix

[dovecot at ptld.com]

> The only solution is to reject all mail for an over-quota recipient
> during recipient restrictions, and if the mail passes that stage,
> deliver it anyway even if it makes the user go over quota.

But does this happen out of the box? Wont dovecot end up back splatter 
bouncing one of the recipients that is over quota after postfix delivers 
all recipients to LMTP?