deny .exe files

[Jennifer Lugar]

How do I set up my openmail or sendmail 8.9.3 to not allow sending or recieving .exe files.

[Robin Wakefield · Accepted solution]

Hi Jennifer,

According to HP, the following should work for messages coming in through the Unix Gateway:

1) edit ~openmail/sys/mime.types
After line
0 application/octet-stream
Add the following line
2188 */* exe

2) edit ~openmail/sys/general.cfg
Change the following line from:

SR_FILTER_TYPES_OF_ATT=TRUE

to:

SR_FILTER_TYPES_OF_ATT=1734,2188

3) Stop and restart service router and unix gateway

I didn't have time to try this out, but you may have better luck.

Rgds, Robin (apologies for late reply).

[James Meadows]

Robin,

We tried the mime.types route and it didn't work at all for us. We ended up blocking much more than we wanted and could never tweak it to only filter exactly as we desired. It seems that the mime type is too unpredictable, depending on the sending PC, email client, and mail servers. We could send an Excel document from two different PCs on our network and the attachments would have differing mime encodings.

James Meadows
Director of University Computing
University of Charleston
Charleston, WV