I have a banner ad that is a game and I have the ability to have the user 'send to a friend'. They type in their friends email and it sends them an email on how to play.

My question is, is that I'm using the sendAndLoad methode to a php file and need to know how to work around the security issue. I can't say what server is okay for flash to accept from in the xml file on the main server because with banner ads, it can be from anywhere. What do I do?