Kai Schaetzl wrote: > Ralph Angenendt wrote on Tue, 14 Oct 2008 17:24:08 +0200: > >> If you don't know the smallest MTU on the path to the mail server, you >> might not be able to send packets over that path, especially if DF is >> set. > > But if it's not set? Shouldn't most devices have it not set? Routers should fragment as needed and the receiving stack will reassemble. Windows tends to set DF on a lot of packets unnecessarily. -- Les Mikesell lesmikesell at gmail.com