sage;
<li> If there are multiple recipients, none of them will automatically 
know that someone else got that message. That is, the default behavior is
similar to the <tt>Bcc</tt> field of popular e-mail clients; 
<li> It is up to you to add the <tt>To</tt> header with the list of primary
recipients so that other recipients can see it;
<li> It is also up to you to add the <tt>Cc</tt> header with the 
list of additional recipients so that everyone else sees it;
<li> Adding a header <tt>Bcc</tt> is nonsense, 