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Tim Durack tdurack at
Fri Mar 13 00:28:22 UTC 2015

Postel's Law
Perhaps his most famous legacy is from RFC 760, which includes a Robustness
Principle which is often labeled Postel's Law: "an implementation should be
conservative in its sending behavior, and liberal in its receiving
behavior" (reworded in RFC 1122 as "Be liberal in what you accept, and
conservative in what you send").

On Thu, Mar 12, 2015 at 8:20 PM, Jason Iannone <jason.iannone at>

> There was once a fairly common saying attributed to an early
> networking pioneer that went something like, "be generous in what you
> accept, and send only the stuff that should be sent."  Does anyone
> know what I'm talking about or who said it?


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