quota only for oungoing

Hello! I setup quota and quota warnings for my mail system(dovecot+exim). By I want to reject only outgoing messages if quota exceeded. Is it possible to congi dovecot to not reject incoming messages? I use dovecot-lda for mail delivery.

ldap_delivery: driver = pipe command = /usr/lib/dovecot/deliver -d "${lookup ldap{user=**********))(mai -f $sender_address -a $original_local_part@$original_domain message_prefix = message_suffix = delivery_date_add envelope_to_add return_path_add log_output return_output user = mail group = mail temp_errors = 64 : 69 : 70: 71 : 72 : 73 : 74 : 75 : 78

-- Aydar A. Kamalov