[ 
https://issues.apache.org/jira/browse/JAMES-820?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12533304
 ] 

Stefano Bagnara commented on JAMES-820:
---------------------------------------

Other mailets probably do not throw exception because they don't need to parse 
the message.

You just need to take care of the exception based on what you want to do when 
the mimemessage is invalid:
http://wiki.apache.org/james/HandlingExceptions

> java.io.IOException: Unknown encoding: 8-bit in AttachmentFileNameIs matcher
> ----------------------------------------------------------------------------
>
>                 Key: JAMES-820
>                 URL: https://issues.apache.org/jira/browse/JAMES-820
>             Project: James
>          Issue Type: Bug
>          Components: Matchers/Mailets (bundled)
>    Affects Versions: 2.3.1
>         Environment: RHE Linux
> j2sdk1.4.2_13
>            Reporter: Ozkan Mehmedali
>
> We are getting quite a lot of these exceptions on our server:
> java.io.IOException: Unknown encoding: 8-bit                                  
>                              
>         at 
> javax.mail.internet.MimePartDataSource.getInputStream(MimePartDataSource.java:106)
>               
>         at com.sun.mail.handlers.text_plain.getContent(text_plain.java:82)    
>                              
>         at 
> javax.activation.DataSourceDataContentHandler.getContent(DataHandler.java:789)
>                   
>         at javax.activation.DataHandler.getContent(DataHandler.java:536)      
>                              
>         at javax.mail.internet.MimeMessage.getContent(MimeMessage.java:1380)  
>                              
>         at 
> org.apache.james.core.MimeMessageCopyOnWriteProxy.getContent(MimeMessageCopyOnWriteProxy.java:34
> 3)                                                                            
>                              
>         at 
> org.apache.james.transport.matchers.AttachmentFileNameIs.matchFound(AttachmentFileNameIs.java:16
> 2)                                                                            
>                              
>         at 
> org.apache.james.transport.matchers.AttachmentFileNameIs.match(AttachmentFileNameIs.java:130)
>    
>         at 
> org.apache.james.transport.LinearProcessor.service(LinearProcessor.java:357)  
>                   
>         at 
> org.apache.james.transport.JamesSpoolManager.process(JamesSpoolManager.java:405)
>                 
>         at 
> org.apache.james.transport.JamesSpoolManager.run(JamesSpoolManager.java:309)  
>                   
>         at java.lang.Thread.run(Thread.java:534)  
> We have other matchers/mailets called before AttachmentFileNameIs in our 
> configuration but this is the only place the exception is thrown.

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