Not receiving form results from MSN Users

had someone write some ASP and Javascript for our nonprofit Web site. It uses CDO to send the form results, and puts the in users email address [as the return address] using [in part]:

'objCDOSYSMail.From = Request("email")'

The JS that validates is [in full]:

<SCRIPT LANGUAGE="JavaScript">
function emailCheck(fld)
{
// first, trim the email text:
var email = fld.value.replace(/^\s+/,"").replace(/\s+$/,"");

var re = /^([a-z][\w\-\'\=]+\.)*[a-z][\w\-\'\=]+\@([a-z][\w\-\'\=]+\.)+[a-z]{2,6}$/i
if ( ! re.test( email ) )
{
alert("Please enter a valid email address");
fld.focus( );
return false;
}
return true;
}
function checkPwd(fld)
{
var pwd = fld.value.replace(/^\s+/,"").replace(/\s+$/,"");
if ( pwd == "" )
{
alert("You did not type the characters into the security box.");
fld.focus( );
return false;
}
return true;
}
function validate(frm)
{
if ( ! emailCheck( frm.email ) ) return false;

if ( ! checkPwd( frm.pwd ) ) return false;

// other validation
return true;
}
</SCRIPT>

And the form field is [in part]:

<td><form name="newsletter" method="post" action="newsletter.asp" onSubmit="return validate(this);">
<input type="hidden" name="_FROM_PAGE" value="newsletter.asp">
<table width="100%" cellpadding="0" cellspacing="0">
<tr>
<td><table width="100%" cellpadding="0" cellspacing="0">
<tr>
<td>&nbsp;</td>
</tr>
<tr>
<td width="585"><div align="left"><span class="style10"> Please provide your email address:</span>&nbsp;
<input name="email" value="<%=Trim("" & Request("email"))%>" size=40>

It all works fine except I don't receive any results from MSN or Hotmail users [at least those are the 2 I'm aware of]. I've removed this line:

var re = /^([a-z][\w\-\'\=]+\.)*[a-z][\w\-\'\=]+\@([a-z][\w\-\'\=]+\.)+[a-z]{2,6}$/i
if ( ! re.test( email ) )

And, it works. I also know that I can change the CDO to use myaddress as the 'from' address, but I'd really like to see who the email is from before I open it. Can someone please help by telling me if I can have it validate and put the users email address in and how?