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# $Id: filtconf.html 391 2007-01-25 03:53:59Z mikes@u.washington.edu $
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# ========================================================================
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# Copyright 2006 University of Washington
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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# http://www.apache.org/licenses/LICENSE-2.0
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# ========================================================================
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<FONT SIZE=+2><B>Message Filtering</B></FONT>
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<p>Filtering is a way to automatically move certain messages from one
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folder to another or to delete messages, according to rules that you
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define. For each filtering rule you define, you will provide a
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<i>Pattern</i> to establish the messages you want filtered, and an
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<i>Action</i>, to control what to do with those messages.</p>
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<p>Click <img src=/images/cf_add.gif alt="Add" align=middle> to go to a screen where you can define a set of
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<p>Click <img src=/images/cf_edit.gif alt="Edit" align=middle> next to a filter that you would like to change. You
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will go to an edit screen. You will only see this option if you have
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already created filters.</p>
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<p>Click <img src=/images/cf_delete.gif alt="Delete" align=middle> next to a filter rule you would like to remove.
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That filter will disappear. You will only see this option if
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you have already created filter rules.</p>
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<p>When you have more than one filter defined, you will see the <img src=/images/cf_shup.gif xalign=middle> (shuffle up),
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and <img src=/images/cf_shdown.gif xalign=middle> (shuffle down), options next to each filter. Use these to
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move your filters up or down in the list. The order is important. Your
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messages will be checked for filtering against the top filter first and,
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if the filter is set up for that message, it will be filtered. If no
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matching information is found, the message will be checked against the
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second filter and so on down the list. Messages that do not match any
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filter rules will be delivered to your Inbox.</p>
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<p>Performance considerations:</p>
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<li>The more filters you have defined the longer it will take to run
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down the list. Deleting unused filters is a good
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<li>Filtering in newsgroups served by an NNTP server will be slow if your
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patterns include tests other than "From:" or
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<li>Filtering a folder served by an IMAP server based on protocol