Problem with MPEG file type

[Alex Neuman van der Hans]

(carefully trying to avoid top-posting and over-quoting ;-) )
Luís Fernando C. Talora wrote:
> Fellows,
> 
>    deny MPEG            No MPEG movies          No MPEG movies allowed

> Have you guys ever experienced that? Is there a solution (other than 
> disabling the line above)?

You may want to try updating your "file" utility, which is what 
MailScanner calls to check what the contents of a file appear to be. 
Your users might also be sending e-mail messages which are formatted as 
to appear to be MPEG files because of a bit.

Google around for "file command" and "magic", which is the file 
command's way of looking for specific sequences that suggest what a file 
might be from its contents. I found the following:

http://www.oracle.com/technology/pub/articles/calish_file_commands.html

... to be useful in understanding "file". The source for "file" is 
available from ftp://ftp.astron.com/pub/file/ - you may want to try 
compiling a new one to see how it goes.

Good luck...