Problem with ms-exe banned files

jeffrey j donovan donovan at
Fri May 20 15:05:38 CEST 2011

On May 20, 2011, at 5:19 AM, Richard Smits wrote:

> Hello,
> We keep getting problems with the ms-exe detection scheme in amavis for banned files. I was wondering :
> Does Amavis only look at the extension of the file ? In this case a ".dat" file, or does it really test the file ?
> For example in linux : file file.dat
> file.dat: DOS executable (device driver)
> I know that this isn't a device driver, but a part from a electronical software scheme.
> How can we avoid this ? Or manipulate the ms-exe detection ?
> X-Amavis-Alert: BANNED, message contains .exe,.exe-ms,file.dat
> Greetings ... Richard Smits

the new Outlook mail client encodes it's font information in a .dat file . tell outlook to send mail in either plaintext or html. Im not sure if Amavis actually opens the dat and inspects it, but it will deny by default windows executables.

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