Anti-Spam Expert

We have a quite successful website (programmed in Django). It is very viral. We send invitation mails on behalf of the users if they want to invite their friends. That meant that we have been sending 300,000 emails per day. Unfortunatly our mails now go to spam filters. We need to resolve this but are not so sure what to do. There are articles on wikipedia on the rules of anti spam but it is not so easy to follow if you have no experience. If you have experience getting emails delivered then we might be able to cooperate. If you have experience, honest and intelligent we are open to different kinds of deals to cooperate with you. For that reason I am not able to specify a price. IF YOU ARE NO GURU ON SPAM AND ANTI-SPAM, DO NOT BID.