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https://issues.apache.org/jira/browse/JAMES-2279?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16518110#comment-16518110
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Phùng Đức Nhật commented on JAMES-2279:
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I wrote a WithPriority mailet on this pull request
[https://github.com/apache/james-project/pull/121]
Enjoy!
> Write a WithPriority mailet and HasPriority matchers
> ----------------------------------------------------
>
> Key: JAMES-2279
> URL: https://issues.apache.org/jira/browse/JAMES-2279
> Project: James Server
> Issue Type: New Feature
> Components: Mailet Contributions
> Affects Versions: master
> Reporter: Tellier Benoit
> Priority: Major
> Labels: easyfix, feature, newbie
>
> James mail queues is handling mail priorities. See the *MailPrioritySupport*
> interface.
> This is done using the MAIL_PRIORITY mail attribute. It is an integer
> property ranging from 0 (low) to 9 (high) and mail queue component will
> default to 5.
> Today, the mail processing unit akka mailetContainer can not change the
> priority set by the SMTP layer (using *MailPriorityHandler*). This is a
> problem as we can not re-prioritise outgoing emails, for instance in remote
> delivery queues.
> I would thus propose the following mailet:
> {code:xml}
> <mailet matcher="All" class="WithPriority">
> <value>8</value>
> </mailet>
> {code}
> Furthermore, we might want to customize processing logic depending on the
> priority (might it just be for debugging purpose).
> To do so, I propose to introduce the following matchers:
> {code:xml}
> <mailet matcher="HasPriority=8" class="Any"/>
> <mailet matcher="AtLeastPriority=8" class="Any"/>
> <mailet matcher="AtMostPriority=8" class="Any"/>
> {code}
> *How to do this?*
> In the `server/mailet/mailets` project, in the mailet package create the
> WithPriority mailet which sets the MAIL_PRIORITY attribute.
> Create the matchers in `server/mailet/mailets` in the matcher package.
> Write unit tests for these mailets / matchers.
> Use MailetUtil content to parse the integer conditions/value. You can reuse
> https://github.com/linagora/james-project/pull/1215 to ease your work.
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