[Mailman-Users] attachments in archives have wrong extensions

DW dwinner-lists at att.net
Fri Sep 16 19:48:16 CEST 2005

Mark Sapiro wrote:
> DW wrote:
>>When users send email to any of my lists with attachments, they go 
>>through fine. But when someone tries to go back and get an attachment 
>>from one of the archives, they almost always find that the link to the 
>>attachment has a bad extension, and the web browser doesn't know what to 
>>do with it. If you do a "save as" and rename it with the proper 
>>extension, the attachments seem to be intact and ok. But most users 
>>don't know to do this, an it is causing us problems.
>>Any solution to this?
>>Here is an example of a file that was posted as MyFile.zip:
>>-------------- next part --------------
>>A non-text attachment was scrubbed...
>>Name: IFQSysFlights.zip
>>Type: application/x-zip-compressed
>>Size: 206816 bytes
>>Desc: not available
>>Url : 
> The scrubber makes the extension from the content-type (shown as Type:
> above). If this doesn't agree with the attachment's extension, the one
> 'guessed' from content-type is used. Here are comments from Scrubber.py
>  # If the filename's extension doesn't match the type we guessed,
>  # which one should we go with?  For now, let's go with the one we
>  # guessed so attachments can't lie about their type.
> The problem in your case is that application/x-zip-compressed is not a
> registered type (no 'x-' types are). See
> ftp://ftp.iana.org/assignments/media-types/
> One possible solution is to use an MUA that will call a .zip file
> "Content-Type: application/zip" which is a registered type, but this
> probably is not a practical solution.
> Another possibility is to change the scrubber to use the file extension
> if any.
> --
> Mark Sapiro <msapiro at value.net>       The highway is for gamblers,
> San Francisco Bay Area, California    better use your sense - B. Dylan

Cool, thanks! Thanks to your input, I was able to track down a solution:

I searched Scrubber.py, and found some logic which said:


so I edited mm_cfg.py and put in the following line:


then restarted mailman.sh

I'm extension-happy now.


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