mail-agents.html

这是很好的学习嵌入式LINUX的文章

</li>

<li>
<p>Maildir Support;</p>
</li>

<li>
<p>Highly customizable.</p>
</li>
</ul>

<p>All of these features help to make <b class="APPLICATION">mutt</b> one of the most
advanced mail user agents available. See <a href="http://www.mutt.org"
target="_top">http://www.mutt.org</a> for more information on <b
class="APPLICATION">mutt</b>.</p>

<p>The stable version of <b class="APPLICATION">mutt</b> may be installed using the <a
href="http://www.FreeBSD.org/cgi/url.cgi?ports/mail/mutt/pkg-descr"><tt
class="FILENAME">mail/mutt</tt></a> port, while the current development version may be
installed via the <a
href="http://www.FreeBSD.org/cgi/url.cgi?ports/mail/mutt-devel/pkg-descr"><tt
class="FILENAME">mail/mutt-devel</tt></a> port. After the port has been installed, <b
class="APPLICATION">mutt</b> can be started by issuing the following command:</p>

<pre class="SCREEN">
<samp class="PROMPT">%</samp> <kbd class="USERINPUT">mutt</kbd>
</pre>

<p><b class="APPLICATION">mutt</b> will automatically read the contents of the user
mailbox in <tt class="FILENAME">/var/mail</tt> and display the contents if applicable. If
no mails are found in the user mailbox, then <b class="APPLICATION">mutt</b> will wait
for commands from the user. The example below shows <b class="APPLICATION">mutt</b>
displaying a list of messages:</p>

<p><img src="mail/mutt1.png" /></p>

<p>In order to read an email, simply select it using the cursor keys, and press the <b
class="KEYCAP">Enter</b> key. An example of <b class="APPLICATION">mutt</b> displaying
email can be seen below:</p>

<p><img src="mail/mutt2.png" /></p>

<p>As with the <span class="CITEREFENTRY"><span
class="REFENTRYTITLE">mail</span>(1)</span> command, <b class="APPLICATION">mutt</b>
allows users to reply only to the sender of the message as well as to all recipients. To
reply only to the sender of the email, use the <b class="KEYCAP">r</b> keyboard shortcut.
To send a group reply, which will be sent to the original sender as well as all the
message recipients, use the <b class="KEYCAP">g</b> shortcut.</p>

<div class="NOTE">
<blockquote class="NOTE">
<p><b>注:</b> <b class="APPLICATION">mutt</b> makes use of the <span
class="CITEREFENTRY"><span class="REFENTRYTITLE">vi</span>(1)</span> command as an editor
for creating and replying to emails. This may be customized by the user by creating or
editing their own <tt class="FILENAME">.muttrc</tt> file in their home directory and
setting the <var class="LITERAL">editor</var> variable.</p>
</blockquote>
</div>

<p>In order to compose a new mail message, press <b class="KEYCAP">m</b>. After a valid
subject has been given, <b class="APPLICATION">mutt</b> will start <span
class="CITEREFENTRY"><span class="REFENTRYTITLE">vi</span>(1)</span> and the mail can be
written. Once the contents of the mail are complete, save and quit from <tt
class="COMMAND">vi</tt> and <b class="APPLICATION">mutt</b> will resume, displaying a
summary screen of the mail that is to be delivered. In order to send the mail, press <b
class="KEYCAP">y</b>. An example of the summary screen can be seen below:</p>

<p><img src="mail/mutt3.png" /></p>

<p><b class="APPLICATION">mutt</b> also contains extensive help, which can be accessed
from most of the menus by pressing the <b class="KEYCAP">?</b> key. The top line also
displays the keyboard shortcuts where appropriate.</p>
</div>

<div class="SECT2">
<h2 class="SECT2"><a id="PINE-COMMAND" name="PINE-COMMAND">22.11.3. pine</a></h2>

<p><b class="APPLICATION">pine</b> is aimed at a beginner user, but also includes some
advanced features.</p>

<div class="WARNING">
<blockquote class="WARNING">
<p><b>警告</b>The <b class="APPLICATION">pine</b> software has had several remote
vulnerabilities discovered in the past, which allowed remote attackers to execute
arbitrary code as users on the local system, by the action of sending a
specially-prepared email. All such <span class="emphasis"><i
class="EMPHASIS">known</i></span> problems have been fixed, but the <b
class="APPLICATION">pine</b> code is written in a very insecure style and the FreeBSD
Security Officer believes there are likely to be other undiscovered vulnerabilities. You
install <b class="APPLICATION">pine</b> at your own risk.</p>
</blockquote>
</div>

<p>The current version of <b class="APPLICATION">pine</b> may be installed using the <a
href="http://www.FreeBSD.org/cgi/url.cgi?ports/mail/pine4/pkg-descr"><tt
class="FILENAME">mail/pine4</tt></a> port. Once the port has installed, <b
class="APPLICATION">pine</b> can be started by issuing the following command:</p>

<pre class="SCREEN">
<samp class="PROMPT">%</samp> <kbd class="USERINPUT">pine</kbd>
</pre>

<p>The first time that <b class="APPLICATION">pine</b> is run it displays a greeting page
with a brief introduction, as well as a request from the <b class="APPLICATION">pine</b>
development team to send an anonymous email message allowing them to judge how many users
are using their client. To send this anonymous message, press <b
class="KEYCAP">Enter</b>, or alternatively press <b class="KEYCAP">E</b> to exit the
greeting without sending an anonymous message. An example of the greeting page can be
seen below:</p>

<p><img src="mail/pine1.png" /></p>

<p>Users are then presented with the main menu, which can be easily navigated using the
cursor keys. This main menu provides shortcuts for the composing new mails, browsing of
mail directories, and even the administration of address book entries. Below the main
menu, relevant keyboard shortcuts to perform functions specific to the task at hand are
shown.</p>

<p>The default directory opened by <b class="APPLICATION">pine</b> is the <tt
class="FILENAME">inbox</tt>. To view the message index, press <b class="KEYCAP">I</b>, or
select the <span class="GUIMENUITEM">MESSAGE INDEX</span> option as seen below:</p>

<p><img src="mail/pine2.png" /></p>

<p>The message index shows messages in the current directory, and can be navigated by
using the cursor keys. Highlighted messages can be read by pressing the <b
class="KEYCAP">Enter</b> key.</p>

<p><img src="mail/pine3.png" /></p>

<p>In the screenshot below, a sample message is displayed by <b
class="APPLICATION">pine</b>. Keyboard shortcuts are displayed as a reference at the
bottom of the screen. An example of one of these shortcuts is the <b class="KEYCAP">r</b>
key, which tells the <acronym class="ACRONYM">MUA</acronym> to reply to the current
message being displayed.</p>

<p><img src="mail/pine4.png" /></p>

<p>Replying to an email in <b class="APPLICATION">pine</b> is done using the <b
class="APPLICATION">pico</b> editor, which is installed by default with <b
class="APPLICATION">pine</b>. The <b class="APPLICATION">pico</b> utility makes it easy
to navigate around the message and is slightly more forgiving on novice users than <span
class="CITEREFENTRY"><span class="REFENTRYTITLE">vi</span>(1)</span> or <span
class="CITEREFENTRY"><span class="REFENTRYTITLE">mail</span>(1)</span>. Once the reply is
complete, the message can be sent by pressing <b class="KEYCAP">Ctrl</b>+<b
class="KEYCAP">X</b>. The <b class="APPLICATION">pine</b> application will ask for
confirmation.</p>

<p><img src="mail/pine5.png" /></p>

<p>The <b class="APPLICATION">pine</b> application can be customized using the <span
class="GUIMENUITEM">SETUP</span> option from the main menu. Consult <a
href="http://www.washington.edu/pine/" target="_top">http://www.washington.edu/pine/</a>
for more information.</p>
</div>
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