appending to Message-Id: line after ">"2000-01-14 18:48:27Is it legal to put additional text on the Message-Id: header line to the right of the closing angle bracket? What about between the colon and the left-side angle bracket? Should it be put into quotation marks or paren- theses for safety? This is part of something for a filter, so it is indirectly procmail-related. Thank you.
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