How to email many people but reciever will only get its own email

I am using Yahoo mail.

If i want to send mail to more then 1 person I just put commas between each mail , but the problem is every one getting it will get the email of other to whom I also mail.

So is there any way , i can send mail to many but the receiver will only see the email address of his own not all

Hope you understand what i mean.

 

use the bcc option