Evolution 1.4.6

Mail source view don't display header lines the way they are folded in
the message store/the way they were sent. Instead it seems that they are
unfolded, and then refolded in different positions before displayed.
This occurs both with messages received over IMAP and messages from local
mbox-folder.

Consider
"Received: from foo\r\n\tvia smtp\r\n\t\r\n\tid foo-4573465786; Tue, 13 Apr
2004 10:17:00 +0200"

This should be displayed like this:

Received: from foo
        via smtp
                                   <<-- tab or whitespace, not empty line
        id foo-4573465786; Tue, 13 Apr 2004 10:17:00 +0200

However, currently this is what I get:

Received: from beo via smtp  id foo-4573465786; Tue, 13 Apr 2004 10:17:00
        +0200

Note the double space after "smtp", before "id".

This way of refolding is also somewhat counter to RFC2822, although still
valid. In section 2.2.3 "Long Header Lines" it says that line breaking
SHOULD be done on "higher-level syntactic breaks". I take that to mean
that you should avoid splitting e.g. a timestamp between the time and the
timezone, instead trying to split before or after the timestamp as a whole.

I think that header folding should be preserved. Whether or not Evolution
should also word-wrap (or add additional folding) on really long header
lines could be discussed.