> if "large enough" cache size is used, late arriving duplicate mail > could be caught by procmail.
Right, but this whole subthread is about throwing away the first message and keeping the second. As has been mentioned, if a "large" cache is used, it means you have to hide the first message for a "large" amount of time and only reveal it if no second message arrives before the first leaves the cache. -- Mike Schiraldi VeriSign Applied Research
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