this key is used to encrypt the users imap password which is stored. in the session record (and the client cookie if remember password is enabled). please provide a string of exactly 24 chars.
这个key用于加密存储的用户imap密码。在session记录中（若客户端的cookie和记住密码已启用）。请提供准确24个字符的字符串。 $rcmail_config['username_domain'] = '';
Automatically add this domain to user names for login. Only for IMAP servers that require full e-mail addresses for login. Specify an array with 'host' => 'domain' values to support multiple hosts. Supported replacement variables: %h - user's IMAP hostname, %n - http hostname ($_SERVER['SERVER_NAME']), %d - domain (http hostname without the first part), %z - IMAP domain (IMAP hostname without the first part), For example %n = mail.domain.tld, %d = domain.tld 为登录用户名自动添加这个域名。仅适用于需要完整的电子邮件地址登录的IMAP服务器。指定一个含有'host' => 'domain'值的数组来支持多台主机。支持变量替换：%h 用户IMAP主机，%n http主机($_SERVER['SERVER_NAME'])，%d域名（没有第一部分的主机名），%z IMAP域名（没有第一部分的IMAP主机名）。若主机名为mail.domain.tld，%n = mail.domain.tld,，%d = domain.tld。 $rcmail_config['mail_domain'] = '';
This domain will be used to form e-mail addresses of new users. Specify an array with 'host' => 'domain' values to support multiple hosts. Supported replacement variables: %h - user's IMAP hostname. %n - http hostname ($_SERVER['SERVER_NAME']), %d - domain (http hostname without the first part), %z - IMAP domain (IMAP hostname without the first part),For example %n = mail.domain.tld, %d = domain.tld
该域名将被用于形成新的用户电子邮件地址。指定一个含有'host' => 'domain'值的数组来支持多台主机。支持变量替换：%h 用户IMAP主机，%n http主机($_SERVER['SERVER_NAME'])，%d域名（没有第一部分的主机名），%z IMAP域名（没有第一部分的IMAP主机名）。若主机名为mail.domain.tld，%n = mail.domain.tld,，%d = domain.tld。
$rcmail_config['password_charset'] = 'ISO-8859-1';
Password charset. Use it if your authentication backend doesn't support UTF-8. Defaults to ISO-8859-1 for backward compatibility
密码字符集。如果您的验证后端不支持UTF-8，为了向后兼容，默认为ISO-8859-1。 $rcmail_config['sendmail_delay'] = 0;
How many seconds must pass between emails sent by a user 多少秒之间必须通过由用户发送电子邮件。 $rcmail_config['max_recipients'] = 0;
Maximum number of recipients per message. Default: 0 (no limit) 最大数量的每封邮件的收件人。默认：0（无限制）。 $rcmail_config['max_group_members'] = 0;
Maximum allowednumber of members of an address group. Default: 0 (no limit).If 'max_recipients' is set this value should be less or equal 一个地址组的成员允许的最大数量。默认：0（无限制）。应小于或等于'max_recipients'设置的值。
$rcmail_config['useragent'] = 'Roundcube Webmail/'.RCMAIL_VERSION;
add this user-agent to message headers when sending 当邮件发送时在邮件User-Agent栏目中添加此信息。 $rcmail_config['product_name'] = ' Web Mail';
use this name to compose page titles
使用这个名称来撰写网页标题
$rcmail_config['include_host_config'] = false;
try to load host-specific configuration. see http://trac.roundcube.net/wiki/Howto_Config for more details 尝试加载特定于主机的配置
$rcmail_config['generic_message_footer'] = '';
path to a text file which will be added to each sent message. paths are relative to the Roundcube root folder 指定一个文本文件的路径，该文件将被添加到每个发送的消息中。路径是相对于Roundcube根文件夹
$rcmail_config['generic_message_footer_html'] = '';
path to a text file which will be added to each sent HTML message. paths are relative to the Roundcube root folder 指定一个文本文件的路径，该文件将被添加到每个发送的html消息中。路径是相对于Roundcube根文件夹。
$rcmail_config['http_received_header'] = false;
add a received header to outgoing mails containing the creators IP and hostname 在传出邮件中添加接收头包含的创造者IP和主机名。 $rcmail_config['http_received_header_encrypt'] = false;
Whether or not to encrypt the IP address and the host name. these could, in some circles, be considered as sensitive information; however, for the administrator, these could be invaluable help when tracking down issues.
是否要加密的IP地址和主机名。这些在某些情况下被视为敏感的信息，然而，对于管理员，在跟踪问题时，这可能是非常宝贵的帮助。 $rcmail_config['mail_header_delimiter'] = NULL;
This string is used as a delimiter for message headers when sending. a message via mail() function. Leave empty for auto-detection
此字符串用来作为分隔邮件标题时发送。通过mail()函数的消息。留空为自动检测。 $rcmail_config['line_length'] = 72;
number of chars allowed for line when wrapping text. text wrapping is done when composing/sending messages 线路数目时允许换行的文本字符。文字环绕完成时撰写/发送邮件 $rcmail_config['send_format_flowed'] = true;
send plaintext messages as format=flowed 纯文本格式发送邮件
$rcmail_config['session_domain'] = '';
session domain: .example.org session域名
$rcmail_config['dont_override'] = array();
don't allow these settings to be overriden by the user
不要让这些设置由用户重写 $rcmail_config['identities_level'] = 0;
Set identities access level:
0 - many identities with possibility to edit all params
1 - many identities with possibility to edit all params but not email address 2 - one identity with possibility to edit all params
3 - one identity with possibility to edit all params but not email address 设置身份访问级别：
0：有多个ID的权限可以修改所有参数
1：有多个ID的权限可以修改除邮件地址的所有参数 2：只有一个ID的权限可以修改所有参数
3：有只有一个ID的权限可以修改修改除邮件地址的所有参数 $rcmail_config['mime_magic'] = '/usr/share/misc/magic';
mime magic database mime magic数据库
$rcmail_config['email_dns_check'] = false;
Enable DNS checking for e-mail address validation
使DNS检查电子邮件地址的验证 G.5、插件（PLUGINS）
$rcmail_config['plugins'] = array('new_user_dialog','markasjunk' ,'password','userinfo');
List of active plugins (in plugins/ directory)
把plugins/目录下的文件夹名，加到数组中。 G.6、用户界面（USER INTERFACE） $rcmail_config['message_sort_col'] = '';
default messages sort column. Use empty value for default server's sorting, or 'arrival', 'date', 'subject', 'from', 'to', 'size', 'cc'
默认信息排序。空值为服务器排序的默认值，你可选择以下值排序。 $rcmail_config['message_sort_order'] = 'DESC';
default messages sort order 升序、降序排序设置
$rcmail_config['list_cols'] = array('subject', 'status', 'from', 'date', 'size', 'flag', 'attachment');
These cols are shown in the message list. Available cols are: subject, from, to, cc, replyto, date, size, status, flag, attachment 在邮件列表中显示的列。
$rcmail_config['language'] = 'zh_CN';
the default locale setting (leave empty for auto-detection) 语言环境设置
$rcmail_config['date_short'] = 'D H:i';
use this format for short date display (date or strftime format) 短时间格式
$rcmail_config['date_long'] = 'Y.m.d H:i';
use this format for detailed date/time formatting (date or strftime format) 长时间格式
$rcmail_config['date_today'] = 'H:i';
use this format for today's date display (date or strftime format)
今天时间格式
$rcmail_config['drafts_mbox'] = 'mail/saved-drafts';
store draft message is this mailbox,leave blank if draft messages should not be stored 草稿箱
$rcmail_config['junk_mbox'] = 'mail/spam-mail';
store spam messages in this mailbox 垃圾邮件箱
$rcmail_config['sent_mbox'] = 'mail/sent-mail';
store sent message is this mailbox, leave blank if sent messages should not be stored 已发送邮件箱
$rcmail_config['trash_mbox'] = 'mail/mail-trash';
move messages to this folder when deleting them, leave blank if they should be deleted directly 回收箱
$rcmail_config['default_imap_folders'] = array('INBOX', 'Drafts', 'Sent', 'Junk', 'Trash');
display these folders separately in the mailbox list. these folders will also be displayed with localized names
在邮筒列表中显示这些文件夹，这些文件夹也将被显示为本地化的名字。 $rcmail_config['create_default_folders'] = false;
automatically create the above listed default folders on login 在登录后自动产生上述默认文件夹
$rcmail_config['protect_default_folders'] = true;
protect the default folders from renames, deletes, and subscription changes 保护默认的文件夹不能重命名，删除和订阅变化 $rcmail_config['quota_zero_as_unlimited'] = false;
if in your system 0 quota means no limit set this option to true
如果在你的系统中0配额意味着没有限定此选项true $rcmail_config['enable_spellcheck'] = true;
Make use of the built-in spell checker. It is based on GoogieSpell. Since Google only accepts connections over https your PHP installatation. requires to be compiled with Open SSL support 利用内置的拼写检查。它是基于GoogieSpell。自从在谷歌仅接受连接你的PHP 安装。 https需要编译时打开SSL的支持。 $rcmail_config['spellcheck_engine'] = 'pspell';
Set the spell checking engine. 'googie' is the default. 'pspell' is also available,but requires the Pspell extensions. When using Nox Spell Server, also set 'googie' here. 把拼写检查引擎。“googie”是默认值。“pspell”是可用的,但是需要pspell延伸。当使用法术服务器,也规定了Nox的googie”在这里。 $rcmail_config['spellcheck_uri'] = '';
For a locally installed Nox Spell Server, please specify the URI to call it. Get Nox Spell Server from http://orangoo.com/labs/?page_id=72.Leave empty to use the Google spell checking service, what means.that the message content will be sent to Google in order to check spelling
为本地安装Nox Spell服务器，请指定URI调用它。 $rcmail_config['spellcheck_languages'] = NULL;
These languages can be selected for spell checking. Configure as a PHP style hash array: array('en'=>'English', 'de'=>'Deutsch'); Leave empty for default set of available language. 可以选择拼写检查的语言。 $rcmail_config['max_pagesize'] = 200;
don't let users set pagesize to more than this value if set 不要让用户设定pagesize超过此值 $rcmail_config['min_keep_alive'] = 60;
Minimal value of user's 'keep_alive' setting (in seconds), Must be less than 'session_lifetime' 用户可设置的'keep_alive'最小值，不得超过'session_lifetime' G.7、地址簿（ADDRESSBOOK SETTINGS） $rcmail_config['address_book_type'] = 'sql';
This indicates which type of address book to use. Possible choises: 'sql' (default) and 'ldap'. If set to 'ldap' then it will look at using the first writable LDAP. address book as the primary address book and it will not display the SQL address book in the 'Address Book' view. 这表明哪一类型的地址簿使用。'sql' 或'ldap' $rcmail_config['ldap_public'] = array();
In order to enable public ldap search, configure an array like the Verisign. example further below. if you would like to test, simply uncomment the example. $rcmail_config['autocomplete_addressbooks'] = array('sql');
An ordered array of the ids of the addressbooks that should be searched, when populating address autocomplete fields server-side. ex: array('sql','Verisign'); $rcmail_config['autocomplete_min_length'] = 1;
The minimum number of characters required to be typed in an autocomplete field, before address books will be searched. Most useful for LDAP directories that may need to do lengthy results building given overly-broad searches G.8、用户偏好（USER PREFERENCES） $rcmail_config['default_charset'] = 'UTF-8';
Use this charset as fallback for message decoding 默认字符集
$rcmail_config['skin'] = 'default';
skin name: folder from skins/ 皮肤
$rcmail_config['pagesize'] = 40;
show up to X items in list view 一页显示数量
$rcmail_config['timezone'] = 8;
use this timezone to display date/time 时区
$rcmail_config['dst_active'] = (bool)date('I');
is daylight saving On? 夏令时
$rcmail_config['prefer_html'] = true;