Benoit Tellier created JAMES-3947:
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Summary: Soft quota
Key: JAMES-3947
URL: https://issues.apache.org/jira/browse/JAMES-3947
Project: James Server
Issue Type: New Feature
Components: JMAP, mailbox, SMTPServer
Reporter: Benoit Tellier
Assignee: Antoine Duprat
h3. Why?
Blocking users and dropping their mails is the rudest thing that could ever
happen. Dropping incoming traffic can cause irremediable data loss, and as such
should be avoided as much as possible.
Soft quota is a way to force user acting before taking the rudest actions is
required.
h3. What?
If the users exceed the soft quota limit (say 95%) prevent this user from
sending email. Receiving is still OK.
This should be enough to force the user acting and fix the issue before taking
extreme decisions.
h3. How?
SMTP: have a softQuota MailHook. This hook, for local sender checks if the soft
quota is exceeded. Soft quota ratio is a parameter of the hook.
JMAP. Have a `softQuotaRatio` configuration option. Have it enforced within
`emailSubmission/set` if `softQuotaRatio < 1`
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