I wish to send the same email to several people at once.

Using Bcc stops all the recipients from seeing any of the email addresses,
that I am sending that email to...

But how do I get 'each recipients' to see 'just their own email address' in
the 'To: field' of the email copy that they receive?
ex:
copy to ~ ~
just sees his email address ~ ~ in his 'To: field'
And...
copy to ~ ~
just sees her email address ~ ~ in her 'To: field'
etc,etc.