Christian email lists

I need at least 500,000 email addresses of Christians. The Christians can be leaders, pastors, members etc. The email addresses must be mainly from the USA and other English speaking countries such as UK, Australia, Canada, New Zealand and South Africa. The Addresses are for a new Christian social networking site for Christians in employment, the workplace and the business environment. The addesses must be of good quality and will be verified before payment can be made. Please provide knowledge/experience of previus work. Only serious bidders please