Re: [cobalt-users] Spam blocking

["Franklin S Werren" <fswerren@xxxxxxxxxxxx>]

Hi all;

My ISP has implemted port 25 blocking to outgoing connects
except the main mail server, even for my mail servers

So all my mail even from my local in house mail
server or my main hosting servers is smart relayed via my ISP's mail server
So far no problems. It stops any internal network
users from sending out mail that comes from an infected
box.. Usually!!!

In otherwords my ISP does not infect other networks on the
net even if a user is infected with one of the mail viruses
and because the mail server checks all outgoing mail for viruses
usually viruses can be nip in the bud so to speak
My ISP is very consumer frendly

The only problem is the incomming spam but I have been working on that
on my mail servers.. I am using several RBL's and that has help to some
extent.
http://www.chautauqualake.net/rbl1.shtml

Franklin S. Werren  www.bagpipes.net   www.chautauqualake.net
www.franksradio.net http://stvef.chautauqualake.net
http://rtcw.chautauqualake.net





----- Original Message ----- 
From: "David Crocker" <dcrocker@xxxxxxxxxxxxxx>
To: <cobalt-users@xxxxxxxxxxxxxxx>
Sent: Tuesday, January 27, 2004 12:21 PM
Subject: RE: [cobalt-users] Spam blocking


> I've recently added the SORBS dynamic IP list to the blacklists that our
server
> uses. This has made a HUGE difference! We are now receiving almost no spam
at
> all, just viruses (and most of these are "Failed delivery" messages
because the
> virus has been sent from somewhere using a forged sender address with our
domain
> name in it).
>
> I've heard it claimed that blocking dynamic IP address ranges is a bad
idea
> because it will block some legitimate email. I've also seen the opinion
> expressed (several times) that anyone sending mail from a dynamic IP
address
> should route the mail through their ISP, not send it direct from their own
SMTP
> server. Does anyone here have any views on and/or experience of this
issue?
>
> David Crocker
> Escher Technologies Ltd.
> www.eschertech.com
>
>
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