request.env availability

Hello everybody,

My application will run on different machines with different host names. In most of my emails I have to include a link with the name of the server the email is coming from. So, I decided to use the request.env hash to get the server name. But request.env is not available in ActionMailer. So, I have to pass that variable to each mailing method from the controller, which doesn't look too good.

Is there a better way? Can I hardcode the name of the server somewhere in the configuration (environment.rb ?) and thus make it available everywhere?

Thanks, Sergei