I'm trying to track down what this does:<br><br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; $messageID = $headers[&quot;message-id&quot;];<br>
&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; if ($messageID) $messageID = substr(substr($messageID, 1), 0, strlen($messageID)-2);<br>
&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; else $messageID = &quot;mid:&quot;.$id;<br>
&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; $result[$id]-&gt;messageID = $messageID;<br>
&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; }<br><br>I see $messageID in a lot of places, while I see messageID(without a variable $ identifier) in other places.<br><br>What is &quot;messageID&quot; for?<br><br>Found in:<br>/public_html/webmail/program/lib/imap.inc
<br>/public_html/webmail/program/steps/addressbook/func.inc&nbsp;&nbsp;&nbsp; $message_id = $headers-&gt;messageID;<br>/public_html/webmail/program/steps/mail/compose.inc&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; $_SESSION['compose']['reply_msgid'] = $REPLY_MESSAGE['headers']-&gt;messageID;
<br>/public_html/webmail/program/steps/mail/func.inc&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; $message_id = $headers-&gt;messageID;<br><br>