1) When user opens his mail, I would like to provide a link or button on the same mail page.
2) If he clicks that link or button, it should extract his mail id(sendto) and delete his mail id from our mail list.
I appreciate if you can help he solving this problem.
Easy: Create a mail-in-database called something like "Unsubscribe List". Have your administrator create the mail-in-database information for you on the server. Then, give your users a link to the email address of the mail-in-database (i.e. unsubscribe-01/server. Then you can simply iterate through the docs with an agent in the mail-in-database and pull any name found in the db from your sending db.
This was first published in January 2002