search for: recipeints

Hi all, i''m trying to email multiple people based on certain criteria. i do a search like @stacks = Group.find(:all, :conditions => ["component_id = ?", 2]) this populates stack to contain multiple groups with component_id =2. How do i populate @recipients to contain all possible @stack.email. Let me clearify. Each stack has its own email, and i need to include each