action_mailer.default_url_options not used in named routes within mailer view ?

rubyonrails-talk
1

In my mailer view I have a named route :

accept_user_invitation_url(@resource, :invitation_token => @resource.invitation_token)

In my routes : accept_user_invitation GET /users/invitation/accept(.:format) {:action=>"edit", :controller=>"users/invitations"}

in development , I set config.action_mailer.default_url_options = { :host => 'lvh.me' , :port => 3000}