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<title>Cyrus IMAP Server: Special Characters</title>
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<h1>Cyrus IMAP Server: Special Characters</h1>
<p>This document is supposed to be a repository of "special characters"
used in Cyrus naming of users, folders, directory paths, etc.</p>
<h2>Current Uses</h2>
<br>
Character: +
<ul>
<li>(LMTP) Separation of postuser and target mailbox for delivery</li>
<li>(LMTP) Separation of username and submailbox for delivery</li>
<li>(IMAP) Flag at end of login name that indicates that LIST should
return LSUB results (when imapmagicplus is set)</li>
<li>(POP3) POP a subfolder directly (e.g. rjs3+foo POPs user.rjs3.foo)</li>
</ul>
<br>
Character: . /
<br>
<ul>
<li>[mailbox names] Hierarchy separators</li>
</ul>
<br>
Character: ^
<br>
<ul>
<li>[mailbox names] In unixhierarchysep, ^ is the part of the internal
name that represents a '.'</li>
</ul>
<br>
Characters: @ %
<br>
<ul>
<li>[usernames] These are realm separators for the purposes of authentication</li>
</ul>
<br>
<h2>Future Uses</h2>
Character: +
<br>
<ul>
<li>IMAP LIST filters (e.g. rjs3+foo will only list folders that match foo*)</li>
<li>possibly other interpretations here:
<br>
- rjs3+foo will do an effective chroot(foo.)
<br>
- rjs3+foo will only list folders in user.rjs3.foo*</li>
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