Email Tracking AOL Webmail/Desktop

I'm trying to continue building up an email tracker - successfully done GMail Yahoo and several web clients. Now I'm stuck with AOL webmail.

Trying the usual methods of using HTTP_REFERER, HTTP_USER_AGENT and REMOTE_ADDR have all yeilded in showing my details and nothing for the referer.

Upon further inspe开发者_如何学运维ction, it seems that AOL's Webmail somehow is loading the messages into an iFrame where the content is local.

Is there anyway to get the referer and still show the image - I did think of using javascript's parent method, though this would stop the tracker pixel/web bug from appearing. Besides, it wouldn't load in web clients.

I would appreciate any help. I also would like to know if AOL's Desktop Email had a User Agent string - I haven't looked on Google just yet (though finding User Agent's for email clients is difficult - still hunting for Outlook versions prior to 2007).