实在不喜欢自带的Sogo网页客户端，又笨又丑。自己就在外面搞了个docker的roundcube管理网页邮箱，依照docker配置好服务器信息，正常登陆都没啥问题。但是管理规则就不行了，就算添加了managesieve插件启动了，在log里面也是提示连接服务器localhost失败。看来根本没传送服务器配置过去，自己见了配置文件，自己手动在plugins/managesieve/里面复制一个配置文件改成conifg.inc.php，然后在里面添加上去sieve服务器内容再映射回去docker。

<?php

// Managesieve server host (and optional port). Default: localhost.
// Replacement variables supported in host name:
// %h - user's IMAP hostname
// %n - http hostname ($_SERVER['SERVER_NAME'])
// %d - domain (http hostname without the first part)
// For example %n = mail.domain.tld, %d = domain.tld
// If port is omitted it will be determined automatically using getservbyname()
// function, with 4190 as a fallback.
// Note: Add tls:// prefix to enable explicit STARTTLS
// or add ssl:// prefix to enable implicit SSL.
$config['managesieve_host'] = 'tls://%h';

服务器记得使用'tls://%h'，%h意思就是用你配置的IMAP服务器。这样子重新docker compose up，查看日志就看到可以正常连接4190的端口服务，用户可以在roundcube网页客户端修改邮件过滤规则了。

参考资料：

https://github.com/roundcube/roundcubemail/issues/7127

https://github.com/roundcube/roundcubemail/issues/9136

https://serverfault.com/questions/1148383/roundcube-unable-to-connect-to-managesieve-server

https://github.com/roundcube/roundcubemail/blob/master/plugins/managesieve/config.inc.php.dist

https://notes.sagredo.eu/en/qmail-notes-185/roundcube-plugins-35.html#sieve