RE: immediate vs. periodic

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Article #790

#790

From: John C Klensin
Date: Wed, 13 Jan 1993 02:31

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>ask for is actually efficacious; for example, frequent reprocessing of
>SMTP channels is largely a waste of resources since unreachable systems
>tend to remain unreachable for periods measured in hours if not days.

Ned,
  It is worth adding to this that HR (RFC1123) prohibits setting
reprocessing of SMTP channels at intervals of less than, if I recall, 30
minutes.  The rationale for that was general concern about network
resources but also recognition of the tendency you mention-- i.e., it is
a waste of resources and can cause congestion on busy systems and it
rarely accomplishes much anyway.
    john

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Subject: RE: immediate vs. periodic
Message-ID: <726892314.102040.KLENSIN@INFOODS.UNU.EDU>
From: John C Klensin <klensin@infoods.mit.edu>
Date: 12 Jan 1993 21:31:54 -0500 (EST)
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