Problem with MPEG file type

[Matt Kettler]

Anything using filetype.rules.conf is dependent on the "file" utility on your
server to attempt to identify the actual type of file involved.

The "file" utility works by checking for any one of a series of magic numbers
located in the file. In theory, this should always work correctly. In practice,
it doesn't.

Check the actual attachments from those messages and feed them to the file
command on your server and see what it says about them.

ie:

$file home.tgz
home.tgz: gzip compressed data, from Unix


Luís Fernando C. Talora wrote:
> Fellows,
> 
> I had the followin line in filetype.rules.conf:
> 
>    deny MPEG            No MPEG movies          No MPEG movies allowed
> 
> Sometimes, users used to complain about send messages without any
> attachments and receiving an error from MailScanner, saying "No MPEG
> movies allowed". After I commented that line, the problem stopped. I
> seems that, under some unknown circumstances (at least for me),
> MailScanner "sees" some nonexistent MPEG attachments on the messages.
> Have you guys ever experienced that? Is there a solution (other than
> disabling the line above)?
> 
> Thanks a lot!
> 
> Regards,
> 
> Luis Talora