godaddy server-site sending spam mails and send mail limit reached daily

I have a dedicated server with godaddy and one of my websites keep sending out spam emails and making venting me from receiving my customer order process emails and extra order info emails from creloaded. My send limit was 1000 yesterday and godaddy increased it to 3000 and now i have reached 3000 also and they have told me i have over 35000 mail in queue to be sent so i know this is some kind of spam or bot. I need this issue resoloved urgently. Paypal or escrow is available. Please i only need an expert that will guarantee their work and can start right away becaiuse i am not getting my customer emails