Date: Tue, 11 Feb 2003 09:40:57 -0500 From: Rahul Siddharthan <rsidd@online.fr> To: Brad Knowles <brad.knowles@skynet.be> Cc: freebsd-chat@freebsd.org Subject: Re: Email push and pull (was Re: matthew dillon) Message-ID: <20030211144057.GA2382@papagena.rockefeller.edu> In-Reply-To: <a05200f2bba6e8fc03a0f@[10.0.1.2]> References: <20030211032932.GA1253@papagena.rockefeller.edu> <a05200f2bba6e8fc03a0f@[10.0.1.2]>
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Brad Knowles said on Feb 11, 2003 at 12:37:46: > At 10:29 PM -0500 2003/02/10, Rahul Siddharthan wrote: > > > http://cr.yp.to/im2000.html > > OK, it's now 2003. Still, nice idea. If spam continues to grow at > > present rates, some such scheme may become necessary by 2010 or > > even earlier... > > Okay, so you're going to replace the e-mail system for the entire > Internet. You're going to go to local storage on the sender's > system, but then you still have to generate messages to be sent to > the recipients to tell them to come pick up their mail -- how do you > do that? > > In and of itself, notices like this could be a DOS or DDOS, > because you have the same criteria for "Hey, you've got e-mail over > here that you need to come pick up" as you do for regular e-mail > today. Granted, the messages would be smaller, but their sheer > number could still be a DOS or DDOS. But I can now block known spammers from even trying to connect, because they can no longer relay their mail and thus can't hide their tracks. Equally important, the law can catch up with the spammers because they can't hide their tracks. You're perfectly correct that it's hard to remove all other options for existing users, but I think the spammers will succeed in that. In fact, I give them until 2007. I'm not saying the solution is DJB's system (though I like it in principle), it's more likely to be some form of better authentication for senders, reduced ability to forge headers etc. One way to transition to a new system would be for mailservers to support both systems for a while, and indicate their support by their HELO greeting. Perhaps some indication can also be put in the MX records. Once a new system is in place, and supported by the big guys (sendmail and Microsoft would be enough), I suspect transition would be pretty fast. Look how quickly the world got rid of open relays: back in 1996 nearly every mail server was an open relay, now the spammers have a hard time finding one. R To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-chat" in the body of the message
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