Glenn,
It could be done accurately with an external test that you could write
in something like VBScript, but it can be quite involved. It can't be
done accurately with Declude filters in JunkMail, though some might
claim it to be accurate enough.
FYI, I haven't found any resistance to blocking executables across more
than 200 domains. Customers expect this, and even if they weren't
blocked, other servers could still, and mostly will, block such files.
Blocking zips is another story, and while some around here swear by it,
I have created an external test in Declude that accurately detects
virtually all zip viruses which allows me to continue to allow
legitimate usage of zip files. This is a conundrum for many right now,
but I don't think that the majority of my customers would understand or
appreciate wholesale blocking of zips containing executables since that
is the preferred method of transferring such files.
Matt
Glenn \ WCNet wrote:
I have a customer who is asking if .bats, exes, and .zips can be blocked on
their mail host. I'm running Declude 1.81. I know extensions can be
blocked with Declude Virus, but not on a per-domain basis. Can it be done
(accurately) with JunkMail filtering?
G.Z.
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