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<h1 id="_1">在邮箱配额中忽略垃圾箱目录</h1>
<p>在 Dovecot 中，针对单个用户的邮箱配额限制定义在下列文件之一：</p>
<ul>
<li><code>/etc/dovecot/dovecot-mysql.conf</code>: MySQL 后端</li>
<li><code>/etc/dovecot/dovecot-pgsql.conf</code>: PostgreSQL 后端</li>
</ul>
<p>如果没有针对单个用户的邮箱配额限制，Dovecot 将使用 <code>/etc/dovecot/dovecot.conf</code>
文件中的 <code>quota_rule[X]</code> 设置。例如：</p>
<pre><code># File: /etc/dovecot/dovecot.conf

plugin {                                                                        

    quota = dict:user::proxy::quotadict
    quota_rule = *:storage=1G
    #quota_rule2 = *:messages=0
    #quota_rule3 = Trash:storage=1G
    #quota_rule4 = Junk:ignore

    ...
}
</code></pre>

<p>因此，要忽略 <code>Trash</code> 目录的邮箱容量，可以在 <code>/etc/dovecot/dovecot.conf</code> 或
<code>/etc/dovecot/dovecot-{mysql,pgsql,ldap}.conf</code> 中增加新的配额规则（quota_rule）。</p>
<ul>
<li>配置示例 1：</li>
</ul>
<pre><code># File: /etc/dovecot/dovecot.conf

plugin {                                                                        

    quota = dict:user::proxy::quotadict
    quota_rule = *:storage=1G
    quota_rule2 = Trash:ignore      # &lt;- 新配额规则：忽略 Trash 目录

    ...
}
</code></pre>

<ul>
<li>配置示例 2:</li>
</ul>
<p>OpenLDAP 后端：</p>
<pre><code># File: /etc/dovecot/dovecot-ldap.conf

user_attrs      = ...,mailQuota=quota_rule=*:bytes=%$,=quota_rule2=Trash:ignore
</code></pre>

<p>MySQL 或 PostgreSQL 后端：</p>
<h1 id="file-etcdovecotdovecot-mysqlconf-or-dovecot-pgsqlconf">File: /etc/dovecot/dovecot-mysql.conf, or dovecot-pgsql.conf</h1>
<p>user_query = SELECT ... \
                   CONCAT('<em>:bytes=', mailbox.quota</em>1048576) AS quota_rule \
                   'Trash:ignore' AS quota_rule2 \      -- 新配额规则：忽略 Trash 目录
                   FROM ...
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