How to add a before_filter in UserMailer which checks if it is OK to mail a user?

is there a global way I can write a before_filter for my user mailer, that checks to see if the user has emails disabled? Right now every mailer I have checks the user's setting, this is very redundant. I would like to DRY this up by having a before_filter that works for all mailers.

class UserMailer < ActionMailer::Base

 before_filter :check_if_we_can_mail_the_user

 ....

 private

   def check_if_we_can_mail_the_user
     if current_user.mail_me == true
       #continue
     else
      Do something to stop the controller from continuing to mail out
     end
   end
 end

Possible? Has anyone done something like this? Thanks