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https://issues.apache.org/jira/browse/EMAIL-82?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12888205#action_12888205
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Siegfried Goeschl commented on EMAIL-82:
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I found the problem and it is not a bug but a feature - there is a System 
property "mail.mime.encodefilename" (see 
http://java.sun.com/products/javamail/javadocs/javax/mail/internet/package-summary.html).
 If set to "true" the property triggers an optional MIME encoding of the 
attachment name if it contains non-ASCII characters which in turn violates the 
MIME specification. Basically MimeUtility.encodeText(text, charset, encoding) 
is applied to the attachment name.

I provided a test (EmailLiveTest.testCorrectCharacterEncoding) to demonstrate 
the problem.

> Attaching .doc files with Greek Names (as filenames) and encoding of the name 
> is wrong 
> ---------------------------------------------------------------------------------------
>
>                 Key: EMAIL-82
>                 URL: https://issues.apache.org/jira/browse/EMAIL-82
>             Project: Commons Email
>          Issue Type: Bug
>    Affects Versions: 1.1
>         Environment: windows xp service pack 2
> Ibm Rational Software Development Platform
>            Reporter: chris bek
>            Assignee: Siegfried Goeschl
>            Priority: Critical
>             Fix For: 1.3
>
>
> I have a file located in my pc localy and i send it as an attachment from 
> multipart mail..sending and attaching works good and file can be opened from 
> mail account..The problem is with the filename for example the file is : "Το 
> εγγραφό μου.doc" ("My document.doc") and the result in attached file is 
> something 
> like this:  ΐ±ΐ±ΑΉ± Ό±½ΔΏ.doc
> if filename is in english i dont have problems..but for my business is 
> essential to have attached documents with greek characters (i tried UTF-*8 as 
> charset for multipart mail and greek iso charset as well but the problem 
> remains...)

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