96 lines
3.3 KiB
Markdown
96 lines
3.3 KiB
Markdown
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# 共享邮箱（和其他用户共享 IMAP 目录）
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> 自 iRedMail-`0.7.0` 版起，共享邮箱的相关设置被配置于 Dovecot 中，但是没有启用。
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> 以下是开启此 "acl" 插件功能的方法。
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> 自 iRedMail-`0.9.0`版起，共享邮箱功能默认开户，用户不需要任何额外的配置。
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> 请勿将“共享目录”和“公共目录”的概念混淆。对于共享目录而言，用户必须选择一个要共享的目录并指定共享给谁。Do not mistake "shared folders" for "public folders". For shared folders,
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> users must select which folder they want to share and with who, using an
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> interface, like IMAP command line or the ones available with Roundcube
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> webmail or SOGo and SOGo connectors.
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## 开户邮箱共享
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要开启邮箱共享功能，请确保 Dovecot 中位于 `/etc/dovecot/dovecot.conf` 路径的配置文件中的 `acl` 插件参数为启用状态，如下所示：
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* Dovecot-1.2 版：
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```
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# Part of file: /etc/dovecot/dovecot.conf
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protocol lda {
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mail_plugins = ... acl
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}
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protocol imap {
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mail_plugins = ... acl imap_acl
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}
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```
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* Dovecot-2.x 版：
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```
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# Part of file: /etc/dovecot/dovecot.conf
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mail_plugins = ... acl
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protocol imap {
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mail_plugins = ... imap_acl
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}
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```
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修改后需重启 Dovecot 服务，以使配置生效。
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## 测试共享目录
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例如：将用户 share from@domain.ltd 的 `Sent` 目录共享给用户 `testing@domain.ltd` 。
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> 警告：不要遗漏 IMAP 命令前面的点 `.` 号。
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```
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# telnet localhost 143 # <- Type this.
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* OK [...] Dovecot ready.
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. login from@domain.ltd passwd # <- Type this.
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# Login with full email address and password
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. OK [... ACL ..] Logged in
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. SETACL Sent testing@domain.ltd rli # <- Type this.
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# Share folder `Sent` with user testing@domain.ltd,
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# with permissions: read (r), lookup (l) and insert (i).
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. OK Setacl complete.
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^] # <- Press `Ctrl + ]` to exit telnet.
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telnet> quit
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```
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以用户 `testing@domain.ltd` 身份登录 Roundcube 网页邮箱或 SOGo 网页邮箱，即可看到共享的目录。
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额外信息：
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* 使用 `SETACL` 命令共享目录后， Dovecot 会在 MySQL 数据库中插入一条记录。
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* 对于采用 OpenLDAP 后端的用户，此记录保存在 `iredadmin.share_folder` 中。
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* 对于采用 MySQL/MariaDB/PostgreSQL 后端的用户，此记录保存在 `vmail.share_folder` 中。
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```
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# mysql -uroot -p
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mysql> USE vmail;
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mysql> SELECT * FROM share_folder;
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+-----------------+--------------------+-------+
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| from_user | to_user | dummy |
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+-----------------+--------------------+-------+
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| from@domain.ltd | testing@domain.ltd | 1 |
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+-----------------+--------------------+-------+
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```
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## 参考资料
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* Dovecot wiki百科：
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* [用户间共享邮箱 (v2.0+)](http://wiki2.dovecot.org/SharedMailboxes/Shared)
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* [用户间共享邮箱 (v1.2+)](http://wiki.dovecot.org/SharedMailboxes/Shared)
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* Roundcubemail 有官方插件 `acl` 用来管理邮箱共享。
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* SOGo 邮箱组件默认支持邮箱共享：右击 IMAP 文件夹，选择 `Sharing` 。
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* [Imap-ACL-Extension for Thunderbird](https://addons.mozilla.org/en-US/thunderbird/addon/imap-acl-extension/), manage acls/permissions for shared mailboxes/folders on imap servers.
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