begin dman quotation: > In an mbox, messages must have a > Lines: header (often added by the delivery agent) so that a reader > knows how many lines the message is.
Not "must have", but it makes mbox processing more efficient. If the Lines header is not there, the reader just reads on until it finds a blank line followed by "From ". This is why, when someone begins a paragraph with the word "From", you often see that the mail software has changed it to ">From" -- it prevents confusion. Craig
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