yeah. it's not completely clear is it? I only got it because I've done this before....
What he was doing is sending emails like this:

FROM: Me
TO: A
BCC: B, C, D, E


When A gets the email it looks like it went to A and only A.
When B gets the email B can see that A also got it... but no one else...
Same with C and so on.

What the OP wants is that when A gets the email, it comes TO A ... when B gets the email it comes TO B .... so that B doesn't see that A also go it... or C.

The short answer is that the only way to hide the other recipients is to but all of the addresses in BCC, and leave TO blank. Now when the recipients get it, it looks like only they got the email... even though it shows up in the BCC, not TO.

-tg