"Greg T. Vincent" <[EMAIL PROTECTED]> wrote:
> I have encountered a recent problem when sending attachments to Windows
> users. I am using Entourage X on OSX 1.3 and whenever I send an AutoCAD
> file to a Windows user it has the creator and type added. Now it didn't
> do this before and I am using the same settings so I don't know what is
> causing this.
> The file is unreadable to the Windows user until the Windows user deletes
> everything after the 3 letter file extension, example:
> I will attach and send the following file with no compression and encoded
> for Windows (MIME/Base64) the Attachment in the attachment window says:
The "encoded for Windows" thing is a bit of a misnomer really. Entourage
just means non-Macintoshes (or at a pinch, systems with single-forked
filesystems (NTFS supports multiple forks, apparently.)) But that's
by-the-by.
> FSR600P.dwg
> The Windows user will get an attachment that says:
> FSR600P.dwg; x-mac-creator=4C4D414E; x-mac-type=54455854.txt
> He can not open this file until everything except the file name and
> extension is deleted.
Those funny strings are the HFS+ creator and type codes, in hex. The
creator above is "LMAN" and the type is "TEXT". Use Terminal.app and type
'man ascii' if you're curious.
The problem might be in the Windows clients. MIME body parts (like file
attachments) have mini-headers which look like this:
Content-Type: image/gif
Content-Disposition: attachment; filename=foo.gif
I'm guessing that the clients are using the Content-Disposition header to
construct their "Attachments" list. The RFC that defines the
Content-Disposition header (RFC 2183) allows for multiple disposition
parameters separated by semi-colons, and allows for disposition parameter
names that start with "x-".
So in that case, a line like:
Content-Disposition: attachment; filename=FSR600P.dwg;
x-mac-creator=4C4D414E; x-mac-type=54455854.txt
(either all on one line or appropriately folded) is perfectly legal and
their mail clients are broken because they aren't able to deal with RFC
2183.
> When he returns the file back to me it also has the creator and type
> stuff. Checking the file extension box and switching to "Any Computer"
> setting have no effect.
> Some files are not affected like MS Word file with a .doc extension are
> ok. Help I am being blamed again for screwing up the Windoze World!
I'd contend they have broken mail clients. But that doesn't help you much!
You might be able to configure your system to better "understand" what to
do with files with .dwg extensions, which might stop Entourage adding those
funny disposition parameters. Check the very recent thread on this list
"Configuring MIME content-types" for details and experiences...
If you want to persuade them their clients are broken, point them at:
<http://www.ietf.org/rfc/rfc2183.txt>
> Thanks,
> Greg
Cheers,
Chris
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