问题：如果想通过域名来访问 inbucket 的页面，在 apache 里设置反向代理后，inbucket 的 monitor 页显示 disconnected 。

尝试：Monitor 页的信息是调用 WebSocket 信息显示的，需要在 apache 的反向代理设置内容中，有相应的内容，如：

RequestHeader unset Origin  

RewriteEngine On
RewriteCond %{HTTP:Connection} Upgrade [NC]
RewriteCond %{HTTP:Upgrade} websocket [NC]
RewriteRule /(.*) ws://127.0.0.1:9000/$1 [P,L]

ProxyRequests Off
SSLProxyEngine on
ProxyPass / http://127.0.0.1:9000/
ProxyPassReverse / http://127.0.0.1:9000/

参考：

• https://github.com/inbucket/inbucket/issues/74
• https://stackoverflow.com/questions/60475454/apache2-cant-set-headers-connection-and-upgrade

现象：xampp 中的 mysql 服务不能成功启动。日志中有如：Fatal error: Can't open and lock privilege tables: incorrect file format 'db' 的错误。

尝试：

1. mysqld --skip-grant-tables # 手工启动，且跳过权限表
2. repair table db use_frm; # 连接到 mysql 命令台，对 mysql 库的 db 表进行修复

如果返回修复成功的提示信息，再关闭 mysql 服务。重新正常启动。

参考：

• https://community.apachefriends.org/f/viewtopic.php?t=79745&
• https://stackoverflow.com/questions/34198735/could-not-open-mysql-plugin-table-some-plugins-may-be-not-loaded
• https://community.apachefriends.org/f/viewtopic.php?t=81626&p=275342

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Rock-Solid VPS

https://local2.anqun.org/mail/?_task=settings&_action=plugin.password

// don't allow these settings to be overridden by the user
$config['dont_override'] = [];

// List of disabled UI elements/actions
$config['disabled_actions'] = [];

https://local2.anqun.org/mail/?_task=settings&_action=plugin.password
https://local2.anqun.org/mail/?_task=addressbook&_source=1

'mail.delete', 'mail.copy', 'mail.move', 'mail.mark', 'mail.send', 'mail.sendmdn', 'mail.import',

./program/js/app.js:1942
['show', 'reply', 'reply-all', 'reply-list', 'move', 'copy', 'delete', 'open', 'mark', 'edit', 'viewsource', 'bounce', 'print', 'load-attachment', 'download-attachment', 'show-headers', 'hide-headers', 'download', 'forward', 'forward-inline', 'forward-attachment', 'change-format']

class="about" innerClass="inner" onclick="UI.about_dialog(this)" />
<roundcube:button command="compose" type="link" class="compose"

config.dark_mode_support: false
https://github.com/roundcube/roundcubemail/blob/master/skins/elastic/meta.json
"dark_mode_support": true,

POST /mail/?_task=mail&_action=expunge HTTP/2.0" 
POST /mail/ HTTP/2.0" 200 651 "https://local2.anqun.org/mail/?_task=settings&_action=add-folder&
'settings.add-folder', 'settings.preferences','settings.identities','settings.responses',

192.168.1.7 - - [15/Jul/2023:16:17:59 +0800] "GET /mail/?_task=mail&_action=getunread&_page=1&_remote=1&_unlock=0&_=1689409079167 HTTP/2.0" 200 99 "https://local2.anqun.org/mail/?_task=mail&_mbox=Trash
?_task=mail&_mbox=Trash"  folder can not be found

mail._mbox=Trash

dovecot
https://forum.vestacp.com/viewtopic.php?t=11948

<!-- folders list -->
<div id="layout-sidebar" class="listbox" role="navigation" aria-labelledby="aria-label-folderlist">
        <div class="header">
                <a class="button icon back-list-button" href="#back"><span class="inner"><roundcube:label name="back" /></span></a>
                <span class="header-title username"><roundcube:object name="username" /></span>
                <roundcube:button name="folderactions" type="link" title="folderactions" label="actions"
                        class="button icon sidebar-menu" innerclass="inner" data-popup="mailboxoptions-menu" />

1. templates/mail.html
2. /templates/includes/mail-menu.html:2:<div id="mailtoolbar" class="toolbar menu" role="toolbar">
./templates/includes/mail-menu.html:28: <roundcube:container name="toolbar" id="mailtoolbar" />
3. vi /opt/www/roundcubemail/config/config.inc.php
// PLUGINS
// $config['plugins'] = array('managesieve', 'password', 'zipdownload');

// List of disabled UI elements/actions
$config['disabled_actions'] = ['settings', 'addressbook','mail.compose', 'mail.delete', 'mail.copy', 'mail.move', 'mail.mark', 'mail.send', 'mail.sendmdn', 'mail.import','mail.reply', 'mail.reply-all', 'mail.reply-list', 'mail.flagged', 'mail.reply', 'mail.reply-all', 'mail.reply-list', 'mail.move', 'mail.copy', 'mail.delete', 'mail.open', 'mail.mark', 'mail.edit', 'mail.viewsource', 'mail.bounce', 'mail.print', 'mail.load-attachment', 'mail.forward', 'mail.forward-inline', 'mail.forward-attachment', 'about', 'mail.expunge', 'mail.purge', 'mail.folders', 'settings.add-folder','settings.folders','settings.preferences','settings.identities','settings.responses','settings.compose','mail.import-messages'];

// automatically create the above listed default folders on user login
$config['create_default_folders'] = false;

// protect the default folders from renames, deletes, and subscription changes
$config['protect_default_folders'] = false;

https://github.com/roundcube/roundcubemail/blob/3b6c06f697eca916d5756795461a8eea4e397cd2/config/defaults.inc.php

现象：某个邮箱用户登录到 roundcube webmail，收件箱列表是空的。原先的邮件数约有十万封。

实践：查看 dovecot 的 imap.log ，出现类似 (Out of memory (service imap { vsz_limit=256 MB }, you may need to increase it)) 的字样。按网上的例子，在 /etc/dovecot/dovecot.conf 添加如下内容后，重启 dovecot 服务即可。

service imap {
  vsz_limit = 1024MB
}

参考：https://forum.iredmail.org/topic11051-increasing-vszlimit.html