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Re: a header authentication scheme

2004-10-27 07:21:23

On Mon October 25 2004 22:13, Laird Breyer wrote:

I hadn't realized that (I thought it was just for reading obsolete
messages). Slightly off topic, I wonder why the trend would be towards 
less precision in time stamps? Doesn't that go against the purpose of 
time stamps in the first place?

Clocks often vary by many seconds between different hosts.
Processing of a single message may take many seconds (DNS
lookups, timeouts, congestion, etc.).  Forged Received lines
usually have timestamps that differ from genuine lines in the
same messages by many hours (or more).  Excessive precision
is neither necessary nor useful.  And the purpose of the time
stamp lines is (RFC 1123) "primarily intended for humans tracing
mail routes, primarily of diagnosis of faults".