[CentOS] Sendmail and pmtu discovery
Les Mikesell
lesmikesell at gmail.com
Tue Oct 14 17:42:47 UTC 2008
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
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