A slight modification to varian's adaptation would be to allow multiple email addresses to map to a single ID. That way, if/when people's email addresses change (marriage, company is bought out, ...) you can still tie their email history together. If ya want....

--roboticus

In reply to Re^3: Summarizing Mail Activity (Long Tail Problem) - lookup table by roboticus
in thread Summarizing Mail Activity (Long Tail Problem) by eskwayrd

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