fixes

app/controllers/posts_controller.rb

@@ -38,6 +38,9 @@ class PostsController < ApplicationController
     end
   end
   
+  def error
+  end
+
 private
   def search_error(exception)
     @exception = exception

app/logical/anonymous_user.rb

@@ -112,6 +112,10 @@ class AnonymousUser
     []
   end
   
+  def email
+    ""
+  end
+  
   def last_forum_read_at
     Time.now
   end

app/mailers/maintenance/user/login_reminder_mailer.rb

@@ -3,7 +3,9 @@ module Maintenance
     class LoginReminderMailer < ActionMailer::Base
       def notice(user)
         @user = user
-        mail(:to => user.email, :subject => "#{Danbooru.config.app_name} login reminder", :from => Danbooru.config.contact_email)
+        if user.email.present?
+          mail(:to => user.email, :subject => "#{Danbooru.config.app_name} login reminder", :from => Danbooru.config.contact_email)
+        end
       end
     end
   end