Simon Lyall
10/06/2004 1:46:38 p.m. >>> It looks like there are lot of NZ based Zombies sending very large amounts of Spam ( much of it in German) to some ISPs.
Would it not be relatively easy to drop all port 25 traffic unless it was directed at your own SMTP server? * (Or are the Zombies sending through your SMTP anyway?) Cheers - N. * - Allow an opt out for anyone that even notices - if they notice, they won't be part of the problem. NOTICE: This message contains privileged and confidential information intended only for the use of the addressee named above. If you are not the intended recipient of this message you are hereby notified that you must not disseminate, copy or take any action in reliance on it. If you have received this message in error please notify Allied Telesyn Research Ltd immediately. Any views expressed in this message are those of the individual sender, except where the sender has the authority to issue and specifically states them to be the views of Allied Telesyn Research.
neil gardner wrote:
Simon Lyall
10/06/2004 1:46:38 p.m. >>> It looks like there are lot of NZ based Zombies sending very large
amounts
of Spam ( much of it in German) to some ISPs.
Would it not be relatively easy to drop all port 25 traffic unless it was directed at your own SMTP server? *
(Or are the Zombies sending through your SMTP anyway?)
This breaks SMTP AUTH for people who send mail via another machine on the Internet, because that host is the only one allowed to send with SPF.
On 10/06/2004, at 2:43 PM, Perry Lorier wrote:
This breaks SMTP AUTH for people who send mail via another machine on the Internet, because that host is the only one allowed to send with SPF.
You conveniently ignored the opt-out system he mentioned. However for such an opt-out system to work, your packet filters would have to adjust themselves as dynamic users log in and out. That would suck. -- Nathan Ward
participants (3)
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Nathan Ward
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neil gardner
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Perry Lorier