faei2.bskl9x3cs.html

linux下的E_MAIL客户端源码

However, this method doesn't work very well
with non-ASCII data, mainly because the
encoded message may be 2 to 3 times the size of
the original.
<P>

<DT><B>Base 64</B>
<DD>This encoding should be used for binary data.
Like
<B>Quoted Printable,</B> all characters are encoded so
they appear as 7-bit ASCII characters. Unlike
<B>Quoted printable</B> encoding, this method works well
with any binary (ASCII or non-ASCII) data.
This is the encoding method is used, for
example, for file types such as
<I>Audio</I>,
<I>GIF</I>, and
<I>JPEG</I>. The encoded message will be about one
third larger than the original.
<P>
<B>Base 64</B> encoding is a "next generation" of
<B>uuencode</B>. It was developed to address the
shortcomings in
<B>uuencode</B>, mainly the lack of
standardization of the algorithm.
<P>

<DT><B>uuencode</B>
<DD>This encoding is also used for binary data. It has
been in use for years and is popular. However, it
is not included in the MIME specification due to
lack of standardization of the algorithm, which
may lead to a recipient being unable to correctly
decode a uuencoded message.
<CITE>Ishmail</CITE> supports
uuencode to increase backward compatibility
with other mail tools.
<P>

</DL>
<DT><B>The file is already encoded this way</B>
<DD>Toggle this option
<KBD>On</KBD> if the file you are including or
attaching has already been encoded. Otherwise
<CITE>Ishmail</CITE>
will encode the file automatically.
<P>

</DL>
<P>
<H4>Figure: <A NAME="zqPXKNB0FN9X3cS">Icons Representing Included Files</H4>

<IMG SRC="FaEI2.BsKL9X3cS.extobj.2.gif">

<H2><A NAME="rrEI2.BsKL9X3cS">Extra Parameters for Attached Files</H2>

<P>
If you are attaching an
external file, the
<B>Include/Attach file data</B> dialog
expands to present extra parameters, depending on the
attachment type. Certain parameters are displayed in the
expanded
<B>Include/Attach file data</B> dialog only when file to be included
or attached is of a certain type. For example, the parameters
<B>Application type</B> and
<B>Application padding</B> only appear when you select
the file type
<EM>application/octet-stream</EM>. The figure below shows an
example of the expanded
<B>Include/Attach file data</B> dialog.

<P>
<H4>Figure: <A NAME="LSKtg-BfiI9X3cS">Expanded Include/Attach File Data</H4>

<IMG SRC="FaEI2.BsKL9X3cS.extobj.3.gif">
<P>
The optional parameters are:
<DL>
<DT><B>Output file name</B>
<DD>This is default path name of the file which will be created
on the recipient's system when the attached file is
retrieved from the sender's system. It is not necessarily
the same as the original file name. The recipient may
also override this name at the time the file is retrieved.
<P>

<DT><B>Application type</B>
<DD>This parameter is specified only for files of type
<EM>application/octet-stream</EM>. You can specify additional type
information that identifies the format of the data.
<P>

<DT><B>Application padding</B>
<DD>This parameter is specified only for files of type
<EM>application/octet-stream</EM>. If your system hardware has a
byte size other than 8-bits, or a word size that is not a
multiple of 8-bits, you specify the number of bits required
for padding here.
<P>

<DT><B>Character Set</B>
<DD>This parameter is required only for ASCII text files
included in a message as a separate body part. You can
specify which ASCII character set to use when displaying
the data.
<P>
An option menu button to the right of the field shows a
list of possible character set names to choose from, or
type the name in the field.
<P>
If the data is included in-line, this implies using the same
character set as the message body.
<P>

<DT><B>Other parameters</B>
<DD>The MIME specification is evolving. Other parameters
are proposed for file attachments. This field lets you add
other parameters that may be defined after this version
of
<CITE>Ishmail</CITE> was released.
<P>

<DT><B>Expires</B>
<DD>This is a date after which the original file may be deleted
or changed. A recipient attempting to retrieve the file
after this date may receive an error or stale data.
<P>

<DT><B>Size</B>
<DD>This is the size of the original file. Specifying this
parameter gives the recipient a hint about how long the
retrieval will take and how much space is needed to hold
the retrieved file.
<P>

<DT><B>Permission</B>
<DD>The file can be marked as either
<B>Read Only</B> or
<B>Read/Write</B>. A
<B>Read Only</B> file will not be changed before the
<B>Expiration Date</B>.
A
<B>Read/Write</B> file may be changed at any time. Therefore,
this parameter is a hint to the recipient that the file need
be retrieved only once (<B>Read Only</B>) or should be retrieved
each time the recipient looks at the data (<B>Read/Write</B>).
<P>

<DT><B>Host</B>
<DD>This parameter is shown only for FTP or TFTP
attachments. It lets you specify the name of the FTP or
TFTP server. It can be a host name, such as
<KBD>ftp.ishmail.com</KBD>, or an IP address, such as
<KBD>206.196.74.36</KBD>.
<P>

<DT><B>Directory</B>
<DD>This parameter is shown only for FTP or TFTP
attachments. It lets you specify the directory which
contains the file to be retrieved. This parameter works in
conjunction with the
<B>File name</B> field. For example, if the
path name of the file is
<I>/ftp/public/data.file</I>, you could
specify the
<B>File name</B> as
<KBD>data.file</KBD> and the
<B>Directory</B> as
<KBD>/ftp/public</KBD>. Or, you could leave the
<B>Directory</B> blank and
specify the
<B>File name</B> as
<KBD>/ftp/public/data.file</KBD>.
<P>

<DT><B>Mode</B>
<DD>This parameter is shown only for FTP or TFTP
attachments. It lets you specify the transfer mode. For
FTP the choices are:
<P>

<UL>
<LI>ASCII
<P>

</LI>
<LI>EBCDIC
<P>

</LI>
<LI>Image/Binary
<P>

</LI>
</UL>For TFTP the choices are:
<P>

<UL>
<LI>NetASCII
<P>

</LI>
<LI>Octet
<P>

</LI>
</UL>
<DT><B>Server address</B>
<DD>This parameter is shown only for mail server
attachments. It lets you specify the e-mail address of the
mail server. For example,
<KBD>[e-mail]</KBD>.
<P>

<DT><B>Subject</B>
<DD>This parameter is shown only for mail server
attachments. It lets you specify the subject line of the
mail message to be sent to the mail server. Depending on
how your mail server is configured, it may expect a
command to be in the
<B>Subject</B> field, the
<B>Body</B> field, or both.
An example command is:
<KBD>get /public/data.file</KBD>.
<P>

<P>
<HR>
<B>WARNING:</B>
<BR>The sender is responsible for understanding
how the mail server is configured and what
commands it expects. This will vary among
different organizations.
<HR>
</P>
<DT><B>Body</B>
<DD>This parameter is shown only for mail server
attachments. It lets you specify the body of the mail
message to be sent to the mail server. Depending on how
your mail server is configured, it may expect a command
to be in the
<B>Subject</B> field, the
<B>Body</B> field, or both. An
example command is:
<KBD>get /public/data.file</KBD>.
<P>

<P>
<HR>
<B>WARNING:</B>
<BR>The sender is responsible for understanding
how the mail server is configured and what
commands it expects. This will vary among
different organizations.
<HR>
</P>
</DL>

<H2><A NAME="YsEI2.BsKL9X3cS">Including a Message from the Active
Folder</H2>

<P>
Use the
<B>Message ...</B> option to copy a message from the active mail
folder (the one shown in the
<B>Folder Contents</B> area of the Main
window) into the message you are composing. The file will be
shown as an icon in the message text. The recipient will be able
to view the included message or save it to a file (or mail folder).
<P>
<B>TIPS:</B>
<OL>
<LI>You can also use "drag and drop" to include a
message from the active folder. Click on the
message in the
<B>Folder Contents</B> area, drag it to
the Composition window, and drop it.
<P>

</LI>
<LI>You can edit the included message. Double
click on the icon to open an edit window. Or,
press and hold the right button and a menu
will pop up offering the option to edit the
message, edit its attributes, or delete it from
the Composition window.
<P>

</LI>
</OL>

<H2><A NAME="hsEI2.BsKL9X3cS">Including Your Signature File</H2>

<P>
Use the
<U>S</U><B>ignature</B> -> option to copy the
<I>.signature</I> file from your
home directory into this message.

<P>
When you click
<U>S</U><B>ignature</B> -> a cascading menu is opened offering
you the choice of four possible
<I>.signature</I> files. See
<A HREF="uhFI2.BsKL9X3cS.html#mqFI2.BsKL9X3cS">Signature
Preferences</A> for information about signature files. You can have
different signatures for internal mail versus external mail. You
can also have plain text and enriched text versions of the
internal and external signatures.
<P>
Clicking this option places the contents of the
<I>.signature</I> file at
the cursor location.
<P>
Another way to add the contents of a
<I>.signature</I> file to the
composition is to click on the
<B>Append Signature</B> button at the bottom
of the Composition window. If you use this method, the signature
is not appended until you send the message.
<P>
<HR>
<B>NOTE:</B>
<BR>If your
<I>.signature</I> file is owned by you, is
<I>not</I>
writable by others, and is executable it will be
treated as an executable program.
<CITE>Ishmail</CITE> will
run the file using your login shell, and capture
its standard output as your signature.
<HR>
</P>

<HR>
Preceding Section: <A HREF="bqbqgMBPQJ9X3cS.html">Include/Attach Option</A><BR>
Following Section: <A HREF="sHQXKNB0FN9X3cS.html">Modifying or Deleting an Included File</A><BR>
Parent Section: <A HREF="bqbqgMBPQJ9X3cS.html">Include/Attach Option</A><BR>
Contents of <A HREF="zsPsIGBSYWwA0YK.html">Ishmail User's Guide</A><BR>
<HR>
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