Martin Hepworth martinh at
Thu Sep 14 17:08:36 IST 2006

Ken Goods wrote:
>>> Colin Jack wrote:
>>>> Hmmm ... it looks like MailScanner is refusing the attachments
>>>> because the .zip file contains unacceptable files ... e.g. .exe and
>>>> .chm 
>>>> This seems a little over the zealous. We usually suggest to clients
>>>> mailing .exe files (install files for example) to .zip them up to
>>>> get through filters!! 
>>>> What is the best way to deal with this? Can I tell MailScanner not
>>>> to look inside .zip files 
>>>> Thanks
>>>> Colin
> Colin,
> Just thought I'd add my 2 cents....
> What I have done here is to instruct my users to rename any executables to
> .txt then instruct their recipient to rename the attachment back to .exe
> once they have received it. 
> This does three things... first, it gets my (very technically illiterate)
> users to be aware of file extensions to begin with and to know what I'm
> talking about when I say this one or that one is potentially dangerous. (it
> also helps them get used to renaming files) Second, since the file has come
> from somebody they know (I instruct them to pre-contact the recipient so
> they are expecting an executable) and has instructions on how to make the
> file back into an executable, it makes them more aware of the way viruses
> are propagated via email and there is less chance that someone will
> inadvertently open a virus (of course I run two virus scanners to this is a
> slim chance anyway). And third, and I guess most importantly, it gets the
> file through any filetype checking based on the extension. (Outlook, OE...
> etc..) Besides, anti-virus software will still catch viruses regardless of
> the file extension.
> One can argue that zipping them up is a better way to handle it but in my
> experience with *my* users, I have found it's easier for them to simply
> rename the file on both ends. This has been working very well here for the
> last couple years... YMMV
> This was a solution I didn't see mentioned so I thought I'd throw it into
> the mix.
> Kind regards,
> Ken Goods
> Network Administrator
> AIA/CropUSA Insurance, Inc.

for what it's worth I normally get at least 2 exe's diguised as 
something else that are blocked by MS BEFORE the AV companies updated 
their signature - last one was 6 weeks ago!

Martin Hepworth
Senior Systems Administrator
Solid State Logic
Tel: +44 (0)1865 842300


This email and any files transmitted with it are confidential and
intended solely for the use of the individual or entity to whom they
are addressed. If you have received this email in error please notify
the system manager.

This footnote confirms that this email message has been swept
for the presence of computer viruses and is believed to be clean.	


More information about the MailScanner mailing list