Re: Securing email by inhibiting urls

["Chris" <chughes () l8c com>]

Should have mentioned that this is a MS Exchange environment.  Spam filters are MS based currently MS based but that’s 
up for grabs if we can replace them with something that provides the same functionality in place now.  Currently using 
Brightmail and other than disabling/replacing urls in email it is working pretty good.

-----Original Message-----
From: Kurt Buff [mailto:kurt.buff () gmail com] 
Sent: Thursday, August 11, 2011 1:32 AM
To: chughes () l8c com; Firewall Wizards Security Mailing List
Subject: Re: [fw-wiz] Securing email by inhibiting urls

mimedefang comes to mind.

http://mimedefang.org

On Mon, Aug 1, 2011 at 11:46, Chris <chughes () l8c com> wrote:
> A company I work for has been having great difficulty in securing against
> email attacks.  So far we have disabled access to webmail, implemented
> rules and processes to block freemail services like hotmail etc until the
> sender registers the address and of course a spam filter (BrightMail).
> Attachment filtering is pretty strict as well.
>
>
>
> The threat that presents the biggest challenge is url links in emails.  The
> common method of attack is an email from somedomain.com where they change
> one character or otherwise make the address look valid (ie:
> joe () s0medomain com or j0e () somedomain com etc).
>
>
>
> I was looking for a way to spot and block hyperlinks but it looks like the
> only option I have is to filter on these and send them to a spam bin.  I’d
> rather yank the offending hyperlink and replace it with a message of some
> sort.  Unfortunately BrightMail doesn’t offer that capability.
>
>
>
> Any products that do this or ideas on a solution?
>
>
>
> Thanks
>
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