I've looked at most of the emails from people that are confused regarding how
to setup the email.  But in the
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/rsadmin/htm/arp
_configserver_v1_4bzl.asp
from Microsoft, it indicates that in SendEmailToUserAlias "true=The e-mail
address of the user creating the subscription is used. This is the default
value", but it is putting the User!UserID instead.

We are using Exchange, and it takes SMTP request OK using SendUsing 2.  I
can send emails to those in the same domain, but I'm wondering how to get the
username to show their email address, instead of blanking it in the TO: box.  
I'd like it to only go to the user that made the subscription only, but the
SMTP email isn't being recognized by Exchange as a valid user name (it isn't
getting resolved).

If I typed in a username in an Exchange window it WILL resolve, but through
Subscriptions it will not.

Here are some of the important settings:

<SMTPServerPort>25</SMTPServerPort>
                        <SMTPAccountName></SMTPAccountName>
                        <SMTPConnectionTimeout>60</SMTPConnectionTimeout>
                        <SMTPServerPickupDirectory></SMTPServerPickupDirectory>
                        <SMTPUseSSL>0</SMTPUseSSL>
                        <SendUsing>2</SendUsing>
                        <SMTPAuthenticate>2</SMTPAuthenticate>

    <SendEmailToUserAlias>false</SendEmailToUserAlias>
                        <DefaultHostName>companyname.com</DefaultHostName>
                        <PermittedHosts></PermittedHosts>