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From: Eric Abrahamsen <eric@ericabrahamsen.net>
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Subject: Re: attachment options?
Date: Tue, 21 Sep 2010 10:14:23 +0800
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On Sun, Sep 19 2010, Lars Magne Ingebrigtsen wrote:

> Eric Abrahamsen <eric@ericabrahamsen.net> writes:
>
>> Content-Disposition: attachment; filename="=?UTF-8?B?54i25Lqy5LygLmRvYw==?="
>
> [...]
>
>> Content-Disposition: attachment;
>>  filename*0*=utf-8''%e8%ae%a9%e6%9b%b4%e5%a4%9a%e7%9a%84%e4%ba%ba%e7%9c%8b;
>>  filename*1*=%e5%88%b0%e7%81%ab%e8%bd%a6.doc
>
> This has to be the culprit.  Gnus uses RFC2231 encoding on file names:
>
> (rfc2231-encode-string "filename" "héllo")
> => "filename*=iso-8859-1''h%e9llo"
>
> While Gmail just RFC2047-encodes the file name.
>
> I think Gnus should just do the same.  I don't think RFC2231 encoding
> ever took off.  I'll check in a fix.

Just noting that this did the trick, Amazon recognizes attachments
properly now…