<?xml version="1.0" encoding="utf-8"?>
<info xmlns="http://projectmallard.org/1.0/">

<item><p>发送者：</p>
<p>发信人的邮件地址或姓名。</p></item>

<item><p>收信人：</p>
<p>邮件的接收者。</p></item>

<item><p>CC:</p>
<p>Only the CC recipients of the message.</p></item>

<item><p>BCC:</p>
<p>Only the BCC recipients of the message. Obviously this can only be applied to outgoing filters.</p></item>

<item><p>Sender or Recipients:</p>
<p>The sender's email address or the name of the sender or the recipients of the message.</p></item>

<item><p>目标：</p>
<p>邮件的主题行。</p></item>

<item><p>指定的邮件头：</p>
<p>Any header including <link xref="mail-composer-custom-header-lines">custom ones</link>.</p>
<p>If a message uses a header more than once, Evolution pays attention only to the first instance, even if the message defines the header differently the second time. For example, if a message declares the Resent-From: header as "engineering@example.com" and then restates it as "marketing@example.com", Evolution filters as though the second declaration did not occur. To filter on messages that use headers multiple times, use a regular expression.</p></item>

<item><p>消息体：</p>
<p>在邮件的正文中搜索。</p></item>

<item><p>表达式：</p>
<p>(For programmers only) Match a message according to an expression you write in the Scheme language used to define <link xref="mail-filters">filters</link> in Evolution.</p></item>

<item><p>Free Form Expression:</p>
<p>(For advanced users only) Combine numerous conditions by using a <link href="https://bugzilla.gnome.org/show_bug.cgi?id=550796#c10">special syntax</link>.</p></item>

<item><p>Date sent:</p>
<p>根据邮件发送的日期过滤邮件。首先，选择您想要邮件匹配日期的条件，例如在指定日期之前或之后。然后，选择日期。过滤器会比较邮件的时间标签、当前运行时的系统时间或一个特定的时刻、以及您从日历中选取的日期。您还可以选择比较相对于当前时间的一个时间段，例如2~4天之前。</p></item>

<item><p>Date received:</p>
<p>与“发信日期”选项的工作方式相同，但它比较您收到邮件的时间和您指定的日期。</p></item>

<item><p>标签：</p>
<p>Messages can have <link xref="mail-labels">labels</link> of Important, Work, Personal, To Do, or Later. You can set labels with other filters or manually.</p></item>

<item><p>分数：</p>
<p>给邮件设置一个大于0的分数。您可以设置一个过滤或改变一个邮件分数，然后设置另一个过滤移动您已评分的邮件。邮件评分没有任何特殊的标准：它只是您给邮件标记的一个数字以便其它过滤器对它们进行操作。</p></item>

<item><p>Size (kB):</p>
<p>根据邮件大小排序，以千兆字节(KB)为单位。</p></item>

<item><p>状态：</p>
<p>根据邮件状态过滤。邮件状态可以是回复，草稿，重要，已读或者垃圾邮件。</p></item>

<item><p>跟随：</p>
<p>Checks whether the message is <link xref="mail-follow-up-flag">flagged for follow-up</link>.</p></item>

<item><p>Completed On:</p></item>
<!-- TODO: Explain usage of option "Completed On" once https://bugzilla.gnome.org/show_bug.cgi?id=698439 is fixed -->

<item><p>附件：</p>
<p>Checks whether there is an attachment for the email.</p></item>

<item><p>Mailing List:</p>
<p>根据邮件来自的邮件列表过滤。这个过滤操作可能会遗漏一些来自某些列表服务器的邮件，因为它检查X-BeenThere信头，这是用于确定邮件列表或其它邮件分发者的。而来自列表服务器的没有正确设置X-BeenThere的邮件就不能被过滤器捕获了。</p></item>

<item><p>正则表达式匹配：</p>
<p>(For programmers only) If you know your way around a <link href="https://en.wikipedia.org/wiki/Regular_expression">regex</link>, or regular expression, this option allows you to search for complex patterns of letters, so that you can find, for example, all words that start with a and end with m, and are between six and fifteen letters long, or all messages that declare a particular header twice. For information about how to use regular expressions, check <link href="man:grep">the man page for the <cmd>grep</cmd></link> command.</p></item>

</info>
