Tim Mancour wrote:
> Hi,
>
> After enabling the -h option in the supervise/smtp/run file I noticed, in
> the log file, that ISP's often assign names to IP addresses that suggest
> that the address is dynamic. Here is a sample of the hostnames from my log
> file:
> host136-158-dynamic.1-87-r.retail.telecomitalia.it
> 201-69-163-55.dial-up.telesp.net.br
> bzq-88-154-233-243.red.bezeqint.net
> 66-205-234-59.idstelcom.net
> pool-72-65-4-63.bflony.east.verizon.net
> c-69-241-8-157.hsd1.ga.comcast.net
> 75-136-129-044.dhcp.gnvl.sc.charter.com
>
> In the past I have attempted to use the control/badhelo feature to filter
> spam but have noticed that the hostname that is provided with the helo
> message can be quite misleading. In addition, the badhelo filter is applied
> to both relay and non-relay clients. What I really want is a method of
> filtering non-relay clients from sending Email to my toaster from what are
> obviously dynamic IP addresses.
>
> Being unable to locate a remotehost filter, I have modified the
> qmail-smtpd.c file to provide support for just such a filter mechanism. I've
> used a configuration file called /control/badremotehost that uses the same
> regular expression parser as the other /control/badxxxx files. This
> mechanism seems to have had the desired effect (~1200 filtered Email
> messages in my little toaster in the past 4 days).
>
> Is if anybody else interested in trying my changes and if so, what would be
> the best way for me to distribute?
>
> Regards,
> Tim
>
I hate to tell you this Tim (because this sounds like a cool patch), but
there are several blacklists that focus on dynamic addresses. I started
using dnsbl.tqmcube.com a few weeks ago (thanks to someone on this list,
sorry I've forgotten who) and that appears to catch numerous dynamic
addresses. I know there are other blacklists as well that target dynamic
addresses.
That being said (and to answer your question), EE (or Nick) would need to ok
the patch for inclusion in the stock toaster.
Being a source code patch, it's not feasible to include with the
qmailtoaster-plus package (which is noarch so it requires no compilation).
--
-Eric 'shubes'
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