To Enable or Disable Quota Enforcement

By default, users or domains can exceed their quotas with no effect except for receiving an over quota notification (if set). Quota enforcement locks the mailboxes from receiving further messages until the disk usage is reduced below the quota level.

To Enable Quota Enforcement

Quota enforcement can be enabled at the Console or by command line.

Steps

1. Click the Quota tab.

2. Check the “Enable quota enforcement” box. To disable quota enforcement, uncheck this box.

3. Click Save.

   Command Line

   To enable or disable quota enforcement:

   configutil -o store.quotaenforcement -v [ on | off]

   Note that over quota messages are saved in the MTA queues and a notification is sent to the sender stating that their messages was not delivered but that a redelivery attempt will be made later. Delivery retries will continue until the grace period expires and all messages are sent back to the senders, or the disk usage falls below the quota and messages can be dequeued from the MTA and delivered to the message store. If you want to return messages that are over quota before they get to the message queues, use the following command line:

   configutil -o store.overquotastatus -v on

Enabling Quota Enforcement at the Domain Level

To enforce quotas for a particular domain, use the command:

imquotacheck -f -d domain

To enable for all domains exclude the -d option. When a domain exceeds its quota, the maildomainstatus attribute is set to overquota, which halts all delivery to this domain. If a domain is not overquota, the value is set to active.

Disabling Quota Enforcement

If it appears that user quotas are being enforced, even when you have disabled them, check the following parameters:

These configutil parameters should be off or not set:

• store.quotaenforcement

• local.store.overquotastatus

• local.store.quotaoverdraft

Note that when store.overquotastatus is on, it always treats store.quotaoverdraft as on, otherwise the user will never go over quota to trigger the rejection. Also, when store.quotaoverdraft is on, the user is allowed one message which is smaller than the quota only. That is, it will never accept a message that is greater than the user’s quota.

After making changes to these parameters, be sure to restart your messaging services.

These Message Store attributes should be active:

• maildomainstatus

• mailuserstatus

Note that messages will bounce if they are larger than the mailbox quota, regardless of quota enforcement configuration.