How would that work? A folded header line does contain one single \n, and then the next line begins with any whitespace. A newline (\n) followed by a non-whitespace is the beginning of a new header.

The whitespace a folded line begins with, may not neccessarly be a \n. In face \n would not be permitted, because a double \n (\n\n) would mark the start of body

Example of a non-folded header line, combined with a folded header line combined with a non-folded one:

Subject: Hi you are beutiful
Content-Type: text/plain;
    format=flowed;
    charset="iso-8859-1";
    reply-type=original
Return-Path: <example@example.org>

[download]
This should result in: 
$fixedheaders[0] = "Subject: Hi you are beutiful";
$fixedheaders[1] = "Content-Type: text/plain;\tformat=flowed;\tcharset
+=\"iso-8859-1\";\treply-type=original";
$fixedheaders[2] = "Return-Path: <example@example.org>";

[download]

In reply to Re^2: Splitting folded MIME headers into indivual headers? by sebastiannielsen2
in thread Splitting folded MIME headers into indivual headers? by sebastiannielsen2

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