Hello,

I'm not sure if you ever got an answere for this subject,,, but I had this same question so here is what I have sent just a sample

Hello Name,

Because you have shown interest in receiving information about online business opportunities, I'd like to mail you a free min DVD that my company has produced.  It fully explains an exciting new way to profit from one of the Internet's largest and most untapped industries.

I hope you are still interested in receiving this kind of information.  Since these DVD's cost me money to send, I will not mail the DVD until I hear back from you so you can confirm that the mailing address I have on record for your is correct.

Please review your information below.

Name
'address
state

If this is correct and YOU DO want me to rush you this exciting DVD as soon as possible, just reply to this email and let me know.  If you would rather have me send the DVD  to a different address, make sure to include that information in your reply.

I strive on using responsible marketing practices, so if you are no longer interested, then please help me keep my mailing list clean by removing yourself from it.  Simply reply with your removal request and I'll promptly take care of it for you.

Thanks name of person!  I look forward to hearing back from you.