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<h1>Expunge a Users mails</h1>
<p>If you want to delete old mails out of the <code>.Junk</code> or <code>.Trash</code> folders or maybe delete all read mails that are older than a certain amount of time you may use dovecot's tool doveadm <a href="https://wiki.dovecot.org/Tools/Doveadm/Expunge">man doveadm-expunge</a>.</p>
<h2 id="the-manual-way">The manual way<a class="headerlink" href="#the-manual-way" title="Permanent link">&para;</a></h2>
<p>That said, let's dive in:</p>
<p>Delete a user's mails inside the junk folder that <strong>are read</strong> and <strong>older</strong> than 4 hours</p>
<div class="highlight"><pre><span></span><code>docker-compose exec dovecot-mailcow doveadm expunge -u &#39;mailbox@example.com&#39; mailbox &#39;Junk&#39; SEEN not SINCE 4h
</code></pre></div>
<p>Delete <strong>all</strong> user's mails in the junk folder that are <strong>older</strong> than 7 days</p>
<div class="highlight"><pre><span></span><code>docker-compose exec dovecot-mailcow doveadm expunge -A mailbox &#39;Junk&#39; savedbefore 7d
</code></pre></div>
<p>Delete <strong>all</strong> mails (of all users) in <strong>all</strong> folders that are <strong>older</strong> than 52 weeks (internal date of the mail, not the date it was saved on the system =&gt; <code>before</code> instead of <code>savedbefore</code>). Useful for deleting very old mails on all users and folders (thus especially useful for GDPR-compliance).</p>
<div class="highlight"><pre><span></span><code>docker-compose exec dovecot-mailcow doveadm expunge -A mailbox % before 52w
</code></pre></div>
<p>Delete mails inside a custom folder <strong>inside</strong> a user's inbox that are <strong>not</strong> flagged and <strong>older</strong> than 2 weeks</p>
<div class="highlight"><pre><span></span><code>docker-compose exec dovecot-mailcow doveadm expunge -u &#39;mailbox@example.com&#39; mailbox &#39;INBOX/custom-folder&#39; not FLAGGED not SINCE 2w
</code></pre></div>
<div class="admonition info">
<p class="admonition-title">Info</p>
<p>For possible <a href="https://wiki.dovecot.org/Tools/Doveadm/SearchQuery#section_date_specification">time spans</a> or <a href="https://wiki.dovecot.org/Tools/Doveadm/SearchQuery#section_search_keys">search keys</a> have a look at <a href="https://wiki.dovecot.org/Tools/Doveadm/SearchQuery">man doveadm-search-query</a></p>
</div>
<h2 id="job-scheduler">Job scheduler<a class="headerlink" href="#job-scheduler" title="Permanent link">&para;</a></h2>
<h3 id="via-the-host-system-cron">via the host system cron<a class="headerlink" href="#via-the-host-system-cron" title="Permanent link">&para;</a></h3>
<p>If you want to automate such a task you can create a cron job on your host that calls a script like the one below:</p>
<div class="highlight"><pre><span></span><code>#!/bin/bash
# Path to mailcow-dockerized, e.g. /opt/mailcow-dockerized
cd /path/to/your/mailcow-dockerized
/usr/local/bin/docker-compose exec -T dovecot-mailcow doveadm expunge -A mailbox &#39;Junk&#39; savedbefore 2w
/usr/local/bin/docker-compose exec -T dovecot-mailcow doveadm expunge -A mailbox &#39;Junk&#39; SEEN not SINCE 12h
[...]
</code></pre></div>
<p>To create a cron job you may execute <code>crontab -e</code> and insert something like the following to execute a script:</p>
<div class="highlight"><pre><span></span><code># Execute everyday at 04:00 A.M.
0 4 * * * /path/to/your/expunge_mailboxes.sh
</code></pre></div>
<h3 id="via-docker-job-scheduler">via Docker job scheduler<a class="headerlink" href="#via-docker-job-scheduler" title="Permanent link">&para;</a></h3>
<p>To archive this with a docker job scheduler use this docker-compose.override.yml with your mailcow: </p>
<div class="highlight"><pre><span></span><code>version: &#39;2.1&#39;
services:
ofelia:
image: mcuadros/ofelia:latest
restart: always
command: daemon --docker
volumes:
- /var/run/docker.sock:/var/run/docker.sock:ro
network_mode: none
dovecot-mailcow:
labels:
- &quot;ofelia.enabled=true&quot;
- &quot;ofelia.job-exec.dovecot-expunge-trash.schedule=0 4 * * *&quot;
- &quot;ofelia.job-exec.dovecot-expunge-trash.command=doveadm expunge -A mailbox &#39;Junk&#39; savedbefore 2w&quot;
- &quot;ofelia.job-exec.dovecot-expunge-trash.tty=false&quot;
</code></pre></div>
<p>The job controller just need access to the docker control socket to be able to emulate the behavior of "exec". Then we add a few label to our dovecot-container to activate the job scheduler and tell him in a cron compatible scheduling format when to run. If you struggle with that schedule string you can use <a href="https://crontab.guru/">crontab guru</a>.
This docker-compose.override.yml deletes all mails older then 2 weeks from the "Junk" folder every day at 4 am. To see if things ran proper, you can not only see in your mailbox but also check Ofelia's docker log if it looks something like this:</p>
<div class="highlight"><pre><span></span><code>common.go:124 ▶ NOTICE [Job &quot;dovecot-expunge-trash&quot; (8759567efa66)] Started - doveadm expunge -A mailbox &#39;Junk&#39; savedbefore 2w,
common.go:124 ▶ NOTICE [Job &quot;dovecot-expunge-trash&quot; (8759567efa66)] Finished in &quot;285.032291ms&quot;, failed: false, skipped: false, error: none,
</code></pre></div>
<p>If it failed it will say so and give you the output of the doveadm in the log to make it easy on you to debug.</p>
<p>In case you want to add more jobs, ensure you change the "dovecot-expunge-trash" part after "ofelia.job-exec." to something else, it defines the name of the job. Syntax of the labels you find at <a href="https://github.com/mcuadros/ofelia">mcuadros/ofelia</a>.</p>
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