class Net::POP3

This method raises a POPError if an error occurs.

this method is called (directly or indirectly) and cached.
restarts; otherwise, it is fetched from the server the first time
messages on the server. This array is renewed when the session
Returns an array of Net::POPMail objects, representing all the

def mails
  return @mails.dup if @mails
  if n_mails() == 0
    # some popd raises error for LIST on the empty mailbox.
    @mails = []
    return []
  end
  @mails = command().list.map {|num, size|
    POPMail.new(num, size, self, command())
  }
  @mails.dup
end