RS> But that's kind of irrelevant as the field does not *have* to be a RS> valid return address for the originating networking; it can be RS> whatever that developer decides will make the message-ID the most RS> useful. In my opinion, uniqueness is the most important and useful RS> attribute of a message-ID, so anything that improves its uniqueness is RS> a virtue.
+1
If SBBS-style MSGIDs are harmless as it seems and other developers decide to use them too, it could become a standard.
Carlos
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