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在邮箱配额中忽略垃圾箱目录

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：

/etc/dovecot/dovecot-mysql.conf: MySQL 后端
/etc/dovecot/dovecot-pgsql.conf: PostgreSQL 后端

如果没有针对单个用户的邮箱配额限制，Dovecot 将使用 /etc/dovecot/dovecot.conf 文件中的 quota_rule[X] 设置。例如：

# 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

    ...
}

因此，要忽略 Trash 目录的邮箱容量，可以在 /etc/dovecot/dovecot.conf 或 /etc/dovecot/dovecot-{mysql,pgsql,ldap}.conf 中增加新的配额规则（quota_rule）。

配置示例 1：

# File: /etc/dovecot/dovecot.conf

plugin {                                                                        

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

    ...
}

配置示例 2:

OpenLDAP 后端：

# File: /etc/dovecot/dovecot-ldap.conf

user_attrs      = ...,mailQuota=quota_rule=*:bytes=%$,=quota_rule2=Trash:ignore

MySQL 或 PostgreSQL 后端：

File: /etc/dovecot/dovecot-mysql.conf, or dovecot-pgsql.conf

user_query = SELECT ... \ CONCAT(':bytes=', mailbox.quota1048576) AS quota_rule \ 'Trash:ignore' AS quota_rule2 \ -- 新配额规则：忽略 Trash 目录 FROM ... ```

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