Am 12.04.2017 um 22:24 schrieb Richard: [ ... ]
There's supposed to be a "null" line between the structured (header) text lines and the rest of the body. The "Subject:" is generally the last of the structured text lines, so you should be able to start your read with the "Subject:" tag and continue reading until you hit the "null" line.
No, there is simply no rule nor evidence that the subject header line is or should be the last of all header lines. Typically you see it somewhere within the mail's header.
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