[Mailman-Users] Filtering by file type - is it possible

[Tokio Kikuchi]

Howard Moscovitz wrote:

> We recently received a message from a masqueraded user. The included 
> attachment was a file of type ".pif". It had a virus which fortunatley 
> didn't do any harm.
> 
> Our list accepts attachments. Most come in as mimetype 
> application/octet-stream. I can't filter out these 
> application/octet-stream attachments, but I can identify the filetypes 
> we can accept. Is there a way I can filter out messages that have 
> attachments with filtypes I don't want?

If you want to strip/pass attachment by content-type header then go to
admin/<listname>/contentfilter page and activate the filter. As most 
viruses fake content-type and send .exe file by image type and so on,
you may want to hold/reject/discard by admin/<listname>/privacy/spam
filter. Then you should try this patch:
http://sourceforge.net/tracker/index.php?func=detail&aid=1026977&group_id=103&atid=300103

-- 
Tokio Kikuchi, tkikuchi@ is.kochi-u.ac.jp
http://weather.is.kochi-u.ac.jp/