[Rails] Receive a notification when the user open an email - Ruby On Rails

I building an application using rails, and I wanna know if is possible to write a code which allows me to be notified or something like that when the user open an email sent through my application. I need to track that information. When I sent an email, I need know. The question to be answered by m

[Rails] Re: Facebook, authlogic, and OAuth2

I'm working on a new version of authlogic_oauth that will use oauth2... I think it's what you are searching for... It will be released at the end of the week, keep eyes on http://github.com/potomak On May 8, 3:52 am, Alex wrote: > Rpx might be good for some people.  It's a single sign-on service