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How to allow .exe mail attachments in OS X Sever 10.6

Posted on 2011-02-26
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Last Modified: 2012-06-22
How do I allow .exe attachments with OS X Server 10.6?

By default, it is not allowed, and you will get an error message stating "banned contents" and the type.

I have looked through the amavisd.conf file, and commented out the two entries that contain mention of .exe file types to ban, restarted the mail service, and yet still get the same problem.
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Question by:flyawaymike
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5 Comments
 
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Expert Comment

by:roylong
ID: 34989395
Don't do it... ...just get the users to compress/zip any .exe files before attaching them, so they are attached as .zip files.

It's not worth the aggro allowing .exe files through email systems - there'd sure be a lot less infections from viruses if this was practiced universally.
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Author Comment

by:flyawaymike
ID: 34989526
doesn't matter if the (self-extracting PGP zip executable) is zipped again in conventional zip, it's still rejected.  

I would just have them use PGP, and send .pgp files (which are not rejected), but the issue is not in my control.
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roylong earned 2000 total points
ID: 34992007
so I looked into this further and just want to know, did you comment out the following line - or just remove the exe from it
$banned_filename_re = new_RE(

### BLOCKED ANYWHERE
# qr'^UNDECIPHERABLE$',  # is or contains any undecipherable components
  qr'^\.(exe-ms|dll)$',                   # banned file(1) types, rudimentary
# qr'^\.(exe|lha|tnef|cab|dll)$',         # banned file(1) types


If you commented out the entire line, then the default position may be to ban exe attachments, if however you copy that line; comment out one of them without an edit; then delete exe from the active line; restart services; see if that helps...
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LVL 15

Expert Comment

by:roylong
ID: 34992011
and the same in the following lines too::

  # block certain double extensions in filenames
  qr'\.[^./]*[A-Za-z][^./]*\.\s*(exe|vbs|pif|scr|bat|cmd|com|cpl|dll)[.\s]*$'i,

# qr'\{[0-9a-f]{8}(-[0-9a-f]{4}){3}-[0-9a-f]{12}\}?'i, # Class ID CLSID, strict
# qr'\{[0-9a-z]{4,}(-[0-9a-z]{4,}){0,7}\}?'i, # Class ID extension CLSID, loose

  qr'.\.(exe|vbs|pif|scr|cpl)$'i,             # banned extension - basic
# qr'.\.(exe|vbs|pif|scr|cpl|bat|cmd|com)$'i, # banned extension - basic+cmd
# qr'.\.(ade|adp|app|bas|bat|chm|cmd|com|cpl|crt|emf|exe|fxp|grp|hlp|hta|
#        inf|ins|isp|js|jse|lnk|mda|mdb|mde|mdw|mdt|mdz|msc|msi|msp|mst|
#        ops|pcd|pif|prg|reg|scr|sct|shb|shs|vb|vbe|vbs|
#        wmf|wsc|wsf|wsh)$'ix,  # banned ext - long
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Author Comment

by:flyawaymike
ID: 34999015
That worked! Thank you!!
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