Trying to block all WAN sent zip emails

[Brent Clark-4]

Hi all

Im trying to get it that I block all zip files, but users in my LAN can
send zip files. Ive tried the following, but yet if I send from my gmail
account, the zip file gets accepted.

deny message = This message contains a prohibited file extension
(${extract{-1}{.}{${lc:$mime_filename}}})
hosts = !+relay_from_hosts :
#!hosts = 192.168.111.0/24
log_message = BAD_ATTACHMENT (${extract{-1}{.}{${lc:$mime_filename}}})
condition = ${if match{${extract{-1}{.}{${lc:$mime_filename}}}}{\N^( \
                       zip\
                       )$\N}{1}{0}}

If someone could assist, it would be appreciated.

Kind Regards
Brent Clark

--
## List details at http://lists.exim.org/mailman/listinfo/exim-users 
## Exim details at http://www.exim.org/
## Please use the Wiki with this list - http://wiki.exim.org/

[Renaud Allard-2]

Hi,

Brent Clark wrote:

> Hi all
>
> Im trying to get it that I block all zip files, but users in my LAN can
> send zip files. Ive tried the following, but yet if I send from my gmail
> account, the zip file gets accepted.
>
> deny message = This message contains a prohibited file extension
> (${extract{-1}{.}{${lc:$mime_filename}}})
> hosts = !+relay_from_hosts :
> #!hosts = 192.168.111.0/24
> log_message = BAD_ATTACHMENT (${extract{-1}{.}{${lc:$mime_filename}}})
> condition = ${if match{${extract{-1}{.}{${lc:$mime_filename}}}}{\N^( \
>                        zip\
>                        )$\N}{1}{0}}
>

Wouldn't be something like this easier?

deny
hosts = !+relay_from_hosts :
condition = ${if match {${lc:$mime_filename}} {\N(\.zip)$\N} {1}{0}}
message = Blacklisted file extension detected in "$mime_filename".





--
## List details at http://lists.exim.org/mailman/listinfo/exim-users 
## Exim details at http://www.exim.org/
## Please use the Wiki with this list - http://wiki.exim.org/

> From: Brent Clark

> condition = ${if match{${extract{-1}{.}{${lc:$mime_filename}}}}{\N^( \

I suspect the blank before the backslash at the end.

--
## List details at http://lists.exim.org/mailman/listinfo/exim-users 
## Exim details at http://www.exim.org/
## Please use the Wiki with this list - http://wiki.exim.org/

[Dennis Davis]

On Thu, 16 Jul 2009, Brent Clark wrote:

> From: Brent Clark <brentgclarklist@...>
> To: exim-users@...
> Date: Thu, 16 Jul 2009 11:42:27 +0200
> Subject: [exim] Trying to block all WAN sent zip emails
>
> Im trying to get it that I block all zip files, but users in my LAN can
> send zip files. Ive tried the following, but yet if I send from my gmail
> account, the zip file gets accepted.
>
> deny message = This message contains a prohibited file extension
> (${extract{-1}{.}{${lc:$mime_filename}}})
> hosts = !+relay_from_hosts :
> #!hosts = 192.168.111.0/24
> log_message = BAD_ATTACHMENT (${extract{-1}{.}{${lc:$mime_filename}}})
> condition = ${if match{${extract{-1}{.}{${lc:$mime_filename}}}}{\N^( \
>                        zip\
>                        )$\N}{1}{0}}
>
> If someone could assist, it would be appreciated.

Section 41.6 of the Exim manual describes how to do this using the
(deprecated) demime condition.  Note you'll have to compile support
for this into exim.

Can't say I've used this recently.  It seemed to work OK when I did.
--
Dennis Davis, BUCS, University of Bath, Bath, BA2 7AY, UK
D.H.Davis@...               Phone: [phone]

--
## List details at http://lists.exim.org/mailman/listinfo/exim-users 
## Exim details at http://www.exim.org/
## Please use the Wiki with this list - http://wiki.exim.org/

[Brent Clark-4]

Renaud Allard wrote:
> Wouldn't be something like this easier?
>
> deny
> hosts = !+relay_from_hosts :
> condition = ${if match {${lc:$mime_filename}} {\N(\.zip)$\N} {1}{0}}
> message = Blacklisted file extension detected in "$mime_filename".
Thanks

This did the trick.

Regards
Brent Clark

--
## List details at http://lists.exim.org/mailman/listinfo/exim-users 
## Exim details at http://www.exim.org/
## Please use the Wiki with this list - http://wiki.exim.org/