One obvious argument being that they're a transport feature, not a user agent feature. Although "delivery" nowadays is an unclear term: just because it's arrived in a POP3-able mailbox, does that mean the message is delivered?
And certainly you don't want return-receipts being generated before you've processed your spam-filters.
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timeasmymeasure
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Date: 2004-03-16 03:46 am (UTC)And certainly you don't want return-receipts being generated before you've processed your spam-filters.