Handling Mail Delivery to Over Quota Users

Keywords: holdexquota, noexquota

The noexquota and holdexquota keywords control the handling of messages addressed to Berkeley mailbox users (UNIX), that is, users delivered to uid the native channel, who have exceeded their disk quotas.

noexquota tells the MTA to return messages addressed to over quota users to the message’s sender. holdexquota tells the MTA to hold messages to over quota users; such messages remain in the MTA queue until they can either be delivered or they time out and are returned to their sender by the message return job.