# File lib/action_mailer/vendor/tmail-1.2.3/tmail/mailbox.rb, line 391 def initialize( dir = nil ) @dirname = dir || ENV['MAILDIR'] raise ArgumentError, "not directory: #{@dirname}"\ unless FileTest.directory? @dirname @new = "#{@dirname}/new" @tmp = "#{@dirname}/tmp" @cur = "#{@dirname}/cur" end