ZCS Administrator Guide 7.2.1
ZCS Administrator Guide 7.2.1
Open Source Edition


Zimbra MTA > Account Quota and the MTA

Account Quota and the MTA
Account quota is the storage limit allowed for an account. Email messages, address books, calendars, tasks, and Briefcase files contribute to the quota. Account quotas can be set by COS or per account.
How message delivery is handled when a Zimbra user’s mailbox exceeds the set quota is set either by the COS or for individual accounts. The MTA can be configured to either send the message to the deferred queue or send the message to the mailbox, even if the quota has been exceeded.
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The MTA server’s bounce queue lifetime is set for five days. The deferred queue tries to deliver a message until this bounce queue lifetime is reached before bouncing the message back to the sender. You can change the default through the CLI zmlocalconfig, bounce_queue_lifetime parameter.
Note:
To permanently have messages bounced back to the sender, instead of being sent to the deferred queue first, set the server global config attribute zimbraLmtpPermanentFailureWhenOverQuota to TRUE.
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Delivering the message to the mailbox that exceeds its quota can be configured in the zimbraMailAllowReceiveButNotSendWhenOverQuota attribute.
When this attribute is set to TRUE, a mailbox that exceeds its quota is still allowed to receive new mail and calendar invites.
This quote bypass is only implemented for messages. All other mail items are still affected by the quota.
You can view individual account quotas from the Administration Console Monitoring Server Statistics section.
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