Re: Sendmail and pmtu discovery

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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@xxxxxxxxx
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