Hello Steve,

thank you for your fast reply.

> Most of what you've done looks okay to me... Have you tried expanding the
> content-disposition header in the attachment sub message to use the size
> attribute?
>
>> Content-Disposition: Attachment; filename="bnclan.gif"
>
> I would also recommend setting creation-date and modification date
> attributes as well, so that the email client has the opportunity to save the
> original file data where possible. For example:
>
> Content-Disposition: Attachment; filename="bnclan.gif"; size=4096;
> creation-date="Thu, 07 Feb 2013 15:30:00 GMT";
> modification-date=" Thu, 07 Feb 2013 15:30:00 GMT"

I added everything. Now it looks like this:

Content-Type: image/gif; name="bnclan.gif"
Content-Transfer-Encoding: base64
Content-Disposition: Attachment;
    filename="bnclan.gif";
    size=8154;
    creation-date="Date: Thu, 07 Feb 2013 16:56:10 +0100";
    modification-date="Date: Thu, 07 Feb 2013 16:56:10 +0100"

But sadly, still the same problem :-( If some Exchange 2003 receives that mail, it destroys the attachment.

Any other ideas? What else can I do wrong that causes Exchange to do so?

Best,

Volker

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Received on 2013-02-07