Well, it was not possible in the beta release but in the latest release from the SVN repository, this functionality is built into the config file.<br><br>
<div><span class="gmail_quote">On 6/24/06, <b class="gmail_sendername">Andrei Dumitriu</b> &lt;<a href="mailto:andy@digitalnerds.net">andy@digitalnerds.net</a>&gt; wrote:</span>
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<div><font face="Arial" size="2">Hi folks</font></div>
<div><font face="Arial" size="2"></font>&nbsp;</div>
<div><font face="Arial" size="2">First of all i'd like to say RC is the ebst webmail i've worked with til now. So, switching to it i needed to let my users the freedom of logging in only with the first part of their e-mail addy. It's not possible by default. Anyway after searching everywhere possible (less forums since they are not working at this moment) i&nbsp;got to look into the code myself. Therefore i decided to make use of a 
main.inc.php variable <strong>$rcmail_config['mail_domain']. </strong>So i changed index.php like this:</font></div>
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<div><font face="Arial" size="2">[Line 148]</font></div>
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<div><font face="Arial" size="2">Make this line:<strong>&nbsp; else if (isset($_POST['_user']) &amp;&amp; isset($_POST['_pass']) &amp;&amp; rcmail_login($_POST['_user'], $_POST['_pass'], $host))</strong></font></div>
<div><font face="Arial" size="2">to look like:&nbsp;<strong>&nbsp; else if (isset($_POST['_user']) &amp;&amp; isset($_POST['_pass']) &amp;&amp; rcmail_login($_POST['_user']<font color="#ff0000">.'@'.$CONFIG['mail_domain']</font>, $_POST['_pass'], $host))
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<div><font face="Arial" size="2"><strong></strong></font>&nbsp;</div>
<div><font face="Arial" size="2">I hope it helps </font></div>
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<div><font face="Arial" size="2">Andy</font></div>
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