<?xml version="1.0" encoding="utf-8"?>
<page xmlns="http://projectmallard.org/1.0/" xmlns:its="http://www.w3.org/2005/11/its" type="topic" id="mail-imap-headers" xml:lang="zh-CN">

  <info>
    <desc>Define which mail headers to download when using IMAP.</desc>
    
    <link type="guide" xref="index#mail-advanced-imap"/>
    <link type="guide" xref="mail-account-manage-imap#imap-headers"/>

    <revision pkgversion="3.1.5" version="0.3" date="2011-07-29" status="final"/>
    <credit type="author">
      <name its:translate="no">Andre Klapper</name>
      <email its:translate="no">ak-47@gmx.net</email>
    </credit>
    <credit type="author">
      <name its:translate="no">Novell, Inc</name> <!-- Content partially from http://library.gnome.org/users/evolution/2.32/b15fx7uz.html.en -->
    </credit>
    <license>
      <p>Creative Commons Share Alike 3.0</p>
    </license>

  </info>


<title>IMAP 信头</title>

<note style="important"><p>The <gui>IMAP Headers</gui> tab is only displayed in the <gui>Account Editor</gui> if <guiseq><gui>Edit</gui><gui>Plugins</gui><gui>IMAP Features</gui></guiseq> is enabled.</p></note>

<p>Evolution allows you for IMAP accounts to choose the headers that you want to download so that you can reduce the download time and filter or move your mail around the way you like it. The IMAP Mail header options are as follows:</p>
<list>
<item><p>Fetch All Headers:</p><p>所有邮件的所有可用IMAP邮件头都会被下载。</p></item>
<item><p>Basic Headers (Fastest):</p><p>这包括日期，发信人，收信人，抄送，主题，首选项，In-Reply-To，邮件ID，Mime版本以及内容类型。如果您只想获取、查看邮件而不需要根据您的邮件列表分类邮件，可以选择该项。这样Evolution会运行的快一些，推荐多数普通用户使用。</p></item>
<item><p>Basic and Mailing List Headers (Default):</p><p>Enable this option to have filters based on mailing list headers (like list ID) so that in addition to the basic headers, the headers that correspond to mailing-lists are also fetched. Mailing list headers will have information such as the mailinglist-ID, owner of the mailing list, and so on with which you can create mailing list filters.</p><p>This is the default Header preference that comes with Evolution. When this option is chosen, Evolution will download a basic set of headers (as described above) along with a set of headers that are needed for client-side filters based on mailing lists. If you do not have any filters on Evolution, it is recommended to switch to the <gui>Basic Headers</gui> option.</p></item>
</list>

<p>要设置IMAP邮件头：</p>
<steps>
<item><p>Select <guiseq><gui>Edit</gui><gui>Preferences</gui><gui>Mail Accounts</gui></guiseq>.</p></item>
<item><p>选择IMAP账户。</p></item>
<item><p>Click <gui>Edit</gui>.</p></item>
<item><p>Click the <gui>IMAP Headers</gui> tab.</p></item>
<item><p>Optionally: If you want to define extra headers to download you can add these in the <gui>Custom Headers</gui> section.</p></item>
</steps>

<note style="tip"><p>The option to define IMAP Headers is currently only available for IMAP accounts, but not for IMAP+ accounts.</p></note><!-- TODO:DEVELOPERS: Recheck this once https://bugzilla.gnome.org/show_bug.cgi?id=655519 has been fixed -->
</page>
