Serious Postfix weirdness

Jordan Gordeev jgordeev at
Fri Nov 14 13:07:35 PST 2008

Joerg Sonnenberger wrote:
On Sat, Nov 15, 2008 at 04:31:55AM +1100, Petr Janda wrote:
Is net.inet.tcp.path_mtu_discovery=1?

No, it was set to 0. is it supposed to be set to 1? If so, should the default 
be 1? As far as documentation goes Ive read most of modern UNIX systems have 
it turned on by default.
It might help.

Does anybody object to turning Path MTU Discovery on by default?
It's been more than 15 years since it was introduced and everybody had a 
chance to learn about it by now.
Is there a technical reason (e.g. related to where the Path MTU is 
stored), for having it off till now?

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