Wordpress classified new subscribers and double optin

I have a classified wordpresss theme I had so much spam that I blocked new subscribers The problem is that I have a lot of spam I don't want to receive an e mail saying I have a new subscriber UNTIL the new subscriber has been through the double optin process with mailchimp I don't want posts waiting in the dashboard for approval before the double optin process is finished. The double optin process would be with mailchimp idealy Here is one of my websites [login to view URL]