Patty,
Well I made an attempt to answer this privately but see no reply to
sender link here.
If you mean on the web site, after you click Reply there should be a "Private" button below and to the right of the message composition box. Clicking that will toggle between "Reply to Group" and "Reply to Sender".
If you mean by email, there should be a "Reply to Sender" link under the message, if the message was formatted. Plain text messages and digests lack that feature; you'd have to copy/paste the sender's email address from the original to your reply.
Shal
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