I am bothered by the facile talk from many quarters of a spam corpus
of a few thousand messages collected over months or years.
Characterizing
spam in an academically rigorous way is hard and I heard of no serious
efforts in that direction. If one doesn't have many current samples
from many addresses at many different kinds of domains, I do not see
how one could claim to have more than mildly interesting anectdotes.
We're talking about a population of 1,000,000,000s of messages sent
daily to 100,000,000s of addresses. Any sample of fewer than 0.1% or
1,000,000s of messages/day (millions per day!) requires convincing
arguments that it is representative instead of mere anectdotes.
Vernon, how many people do you think Gallup interviews when they do the
polls for the Presidential elections.
Hint: You do not need a very large sample to have pretty accurate results
even if the population is very large.
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