I am posting the relpy a little late.
The reason for not using BCC is that I fear that my mails might be treated as unsolicited mail and delivered to bulk mail folder. (PLcorrect me if I am wrong)
I would like to paste the "TO" field of the mail I received few days back
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"Undisclosed-Recipient:;"@md.mailserve.net <"Undisclosed-Recipient:;"@md.mailserve.net>
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This E-mail was sent to multiple recipients. But each individual recipient will not know to whom else the mail was sent. That is what I want to do.