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https://issues.apache.org/jira/browse/JAMES-2682?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16794654#comment-16794654
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Tellier Benoit commented on JAMES-2682:
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Pablo openend a pull request for this:
https://github.com/linagora/james-project/pull/2249
> Infinite loop can be triggered upon Sieve failure
> -------------------------------------------------
>
> Key: JAMES-2682
> URL: https://issues.apache.org/jira/browse/JAMES-2682
> Project: James Server
> Issue Type: Bug
> Components: Mailet Contributions
> Affects Versions: master, 3.3.0
> Reporter: Tellier Benoit
> Priority: Major
>
> As pointed out by [~pleira], failing sieve processing can generate an mail
> infinite loop.
> SieveExecutor::handleFailure sends a mail to the user, that is also SIEVE
> processed (and thus fails) creating a loop.
> To prevent this loop, we should avoid Sieve processing on Sieve error
> notification emails.
> In Sieve executor, position a `"SieveNotification" -> true` mail attribute in
> `SieveExecutor::handleFailure`. In SieveExecutor::execute check this mail
> attribute and if present and true, do not perform the execution. You will
> write a unit test in SieveIntegrationTest - Emails with this attribute should
> not be processed.
> If you have any issue don't hesitate to reach us in
> https://gitter.im/apache/james-project
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