DiskWarrior & Pan - munged messages

[Scott Taylor]

What¹s strange is that only Jim¹s message get munged up like this, and only
sometimes.  I discussed it with him, and he isn¹t doing anything different
from one message to the next.  I have looked at the headers of good and
messed up messages, and they do have different encoding.  But why, no one
seems to know.  And it would seem they only look that way to Entourage X
users?

Scott


From: David Thompson <dthmpsn1 at illinois.edu>
Reply-To: "Panorama Questions & Answers \(Discussion\)" <qna at provue.com>
Date: Fri, 23 May 2008 16:56:38 -0500
To: "Panorama Questions & Answers \(Discussion\)" <qna at provue.com>
Subject: Re: DiskWarrior & Pan - munged messages

>No, I did not, and it came back to me OK. So the little rectangles which
>replace the returns got replaced with returns in that reply.
>
>I suspect that Jim's messages are missing a line feed or carriage return,
>when they should have both.

The messages look OK in Eudora, but looking at the raw source of the
email, the problem seems to be with messages that have been base64
encoded because they contain non-ascii characters. Line feeds in the
text aren't being converted to crlf before they are encoded. Someone
at Bare Bones Software seems to have overlooked this part of rfc2045:

Care must be taken to use the proper octets for line breaks if base64
    encoding is applied directly to text material that has not been
    converted to canonical form.  In particular, text line breaks must be
    converted into CRLF sequences prior to base64 encoding.  The
    important thing to note is that this may be done directly by the
    encoder rather than in a prior canonicalization step in some
    implementations.

Dave
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