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FTC Wants Comments on Email Authentication

An anonymous reader writes "Groklaw has the scoop. The Federal Trade Commission and National Institute of Standards and Technology (NIST) will co-host a two-day 'summit' November 9-10 to explore the development and deployment of technology that could reduce spam. The E-mail Authentication Summit will focus on challenges in the development, testing, evaluation, and deployment of domain-level authentication systems. The FTC will be accepting public comments until Sept. 30, 2004 via snail-mail or email (authenticationsummit at ftc.gov). The FTC has a list of 30 questions they would like answers/comments to. The list available in this PDF of the Federal Register Notice." In a related subject, reader Fortunato_NC submits this writeup of the sequence of events that led to Sender-ID's abandonment.

46 of 208 comments (clear)

  1. spam about spam by metallikop · · Score: 3, Funny

    Seems like slashdot is being spammed with stories about spam.

  2. My comments? by cuzality · · Score: 4, Funny

    I will be sending my comments immediately by email. They'll know who I am.

    1. Re:My comments? by orthogonal · · Score: 4, Funny
      I will be sending my comments immediately by email. They'll know who I am.

      THIS AUTHENTICATED EMAIL
      HAS BEEN APPROVED
      AS CHRISTIAN AND PATRIOTIC
      BY THE
      REICHSPROTECTOR OF INFORMATION
      FOR THE UNITED HOMELAND
      by direction of
      JOHN D. ASHCROFT,
      REICHSMINISTER OF JUSTICE


      We want all your papers, please!

      And yes, we do know who you are, Citizen!

      CC: PATRIOT DATABASE, REICHSMINISTRY OF INFORMATION
  3. for all the bots... by Anonymous Coward · · Score: 5, Funny


    authenticationsummit@ftc.gov

  4. They won't be happy. by Anonymous Coward · · Score: 3, Insightful

    These guys aren't going to be happy until we have to hand over our credit cards, photo ID and social security number just to send an email.

    1. Re:They won't be happy. by fleener · · Score: 3, Insightful
      Correct. My primary e-mail accounts have been spam-free for 3 years, since I started watching where and how I give people and web sites my address. Through a few simple measures you can protect a new address without the need for spam filters, with no need to hinder your regular personal and professional correspondence (assuming you don't correspond with spammers).

      The *only* spam I receive on my permanent accounts is an occassional worm-sent e-mail and a guessed-address spam every 3 or 4 months (and those have never led to more spam).

      People who piss and moan about spam (basically everyone) are refusing to accept that they live in a dangerous world. There was a time when people left their front door and windows unlocked. An ounce of prevention is worth a billion pounds of cure, in terms of spam.

      I'll never support an authentication system that costs me more money to send e-mail because I have zero need for an authentication system.

      People who don't use throw-away accounts for risky correspondence are having anonymous sex without a condom. Go ahead, mod me down because you don't believe me and think spam is just the cost of doing business on the Internet. It's not.

    2. Re:They won't be happy. by Arngautr · · Score: 2, Insightful
      You are largely correct, but I strongly disagree with the conclusions you draw. Why should we have to use images for email addresses just so a bot doesn't pick it up, why should we bow down to the spammers and hide contact info:

      fleener
      (email not shown publicly)

      Wouldn't it be nice if we could actually use email as it was intended?

    3. Re:They won't be happy. by dubl-u · · Score: 2, Insightful

      The *only* spam I receive on my permanent accounts is an occassional worm-sent e-mail and a guessed-address spam every 3 or 4 months (and those have never led to more spam).

      Then you're a lucky fellow. A few months back I enabled a bunch of aliases for common dictionary attack names, and those aliases are rising rapidly in volume. (That's fine with me, as they're just fed right to the Bayesian training program.) But eventually, it will spread, and your oh-so-pure address will be compromised.

  5. NOTHING but an open standard. by garcia · · Score: 4, Insightful

    From Groklaw:

    7. Whether any of the proposed authentication standards would have to be an open standard (i.e., a standard with specifications that are public).

    Of course the standard would have to be open. This shouldn't even be up for discussion. No argument can make security by obscurity work and no argument can get me to change my thinking that we should all be using closed SMTP servers.

    Spam is "horrific" and all (BTW I don't get more than 5 a year) but we certainly shouldn't even be considering ending it by choosing applications that will eliminate an open society.

    1. Re:NOTHING but an open standard. by JabberWokky · · Score: 4, Interesting
      Spam is "horrific" and all (BTW I don't get more than 5 a year)

      And I get 1800 a day. That's because I am the public contact for several companies with some of my email addresses dating back over 10 years. In conjunction with theater groups and businesses, my email appears in press releases, on fliers, ancient usenet posts, and otherwise all over the place.

      Individuals using their email account to talk to friends don't have as much a problem as people who use their email address publically for business and publicity.

      My phone number and address are also published. I don't, however, get 1,800 unsolicited calls every day and my junk physical mail is quite reasonable.

      --
      Evan "I'm not even saying Spam is bad, I'm just saying it costs me serious time"

      --
      "$30 for the One True Ring. $10 each additional ring!" -- JRR "Bob" Tolkien
    2. Re:NOTHING but an open standard. by JimDabell · · Score: 2, Insightful

      an open standard (i.e., a standard with specifications that are public).

      In my mind, an "open standard" isn't just one anybody can read, but one that is open to anybody implementing it - which means patent-free. It's no good everybody being able to read the specifications if nobody is allowed to do anything with them.

    3. Re:NOTHING but an open standard. by Chief+Typist · · Score: 2, Interesting

      Individuals using their email account to talk to friends don't have as much a problem as people who use their email address publically for business and publicity.

      And this, my friends, is the real cost of SPAM. It's not about the bandwidth, it's about the lost business.

      In my business, the cost of a losing a customer because of miscommunication far outweighs the cost of the bandwidth SPAM uses on my server. If customers/reviewers/resellers get lost in the flood of SPAM it costs me money.

      And then there's the cost of having someone spend time weeding through all the crap (SPAM identification tools help, but human intervention is still needed for false positives, etc.)

      It's good to see that the FTC is getting involved -- this is a business/trade problem, not a communication problem.

      -ch

  6. The Hardest Issue by Nos. · · Score: 5, Interesting

    Is to keep email easy to use. SPF is a nice idea, but doesn't cope with a couple issues. The first is that a lot of SPAM comes from trojan'd machines. SPF won't prevent or help mark email coming from these machines as SPAM. Secondly, its not expensive to register a domain and flood SPAM for a few days until that domain is blacklisted. Wash, rinse, repeat. I'm not saying a solution isn't out there, just nothing that I have seen really talks to these two issues.

    1. Re:The Hardest Issue by thogard · · Score: 3, Informative

      You only found 2 issues with SPF?
      How about a few more

      Since I wrote that, I've managed to come up with SPF rulesets that cause DOS on some of the common implementations, my dns has been scaned countless times looking for SPF records and I've had over 1000 spam messages with valid SPF records.

    2. Re:The Hardest Issue by glesga_kiss · · Score: 2, Insightful
      SPF is a nice idea, but doesn't cope with a couple issues. The first is that a lot of SPAM comes from trojan'd machines. SPF won't prevent or help mark email coming from these machines as SPAM.

      No, but when the luser finds out that their e-mail is broken, they might just do something about their trojaned machine. Which is in fact fixing the problem and not the symptom. Any "authenticated user" idea for SPAM prevention has to account for the fact that there will need to be a "compromised" flag on the account to mark if mails are suspect.

    3. Re:The Hardest Issue by perp · · Score: 4, Informative
      The first is that a lot of SPAM comes from trojan'd machines. SPF won't prevent or help mark email coming from these machines as SPAM.

      Yes it will. Almost all of those trojanned machines send mail directly to the receiving server, not through the mail relay of the spoofed sender. If the email purports to be from jblow@someplace.com, the receiving mail server can check someplace.com's spf record and see that the ip address of the trojanned machine is not allowed to send mail. That is the very essense of what it does.

      You are correct that a spammer with a server can publish an spf record, but he is much, much easier to blackhole than a rapidly changing large selection of compromised dsl machines.

      --
      There are two kinds of sysadmins: paranoids and losers. I'm both kinds.
    4. Re:The Hardest Issue by iabervon · · Score: 2, Informative

      It doesn't cope with world hunger, the war in Iraq, or many other issues. SPF doesn't really have anything to do with unsolicited email. Its only intented effect is to make solicited email more distinctive. This can eliminate some significant false positives in spam filters (email that would be spam if it weren't sent from a government agency that you had applied for a grant from, for instance).

      SPF will not prevent or help mark any email as SPAM. It will mark a lot of phishing scams as forgeries. It will let people avoid having spam sent with their address forged on it. It will give people sending non-spam to people who know them a way of marking their email as non-spam in a way that is very difficult for spammers to imitate.

    5. Re:The Hardest Issue by ajs · · Score: 3, Informative

      Repeat after me, "SPF DOES NOT PREVENT SPAM. SPF DOES NOT ATTEMPT TO PREVENT SPAM. IF YOU EXPECT SPF TO PREVENT SPAM, YOU WILL BE DISAPOINTED."

      Ok, yelling done (sorry, but this comes up so often, you'd think the "S" stood for Spam). What SPF *does* do is validate that mail was sent from a machine that was (or was not) authorized to send it by the originating domain.

      It's nothing more or less than that. As a first-pass on the roots of the problem of spam, it's a great tool, but I would never suggest that anyone treat it as an actual solution for spam per se. Joe Jobs are mitigated and you can also begin to build a reputation with the sources of SPF-identified mail. Once you get spam from a machine that's listed as a valid SPF sender for that doamin, you have a great deal more information to apply ot that domain's reputation than if you recieved spam from a non-SPF sender.

      It's not perfect (SPF has its warts, though I think many of your concerns are too minor to be blasting them over), but it is an excellent start, and combined with various other systems out there, helps to address many existing problems.

  7. Why not go after the merchants? by 14erCleaner · · Score: 5, Interesting

    You know, I can't figure out why we can't combat spam by making it illegal to send unsolicited ads via email (or maybe the can-spam act already does this), but then go after the companies who are actually trying to get customers. After all, they either provide valid contact information, or nobody can buy from them. If nobody can sell anything via spam any more, the reason for it would go away.

    --
    Have you read my blog lately?
    1. Re:Why not go after the merchants? by Sneeper · · Score: 2, Insightful

      Spammers will render that system useless by sending out spam for innocent companies. You could attack your competitor by anonymously sending spam for them.

      Both guilty and innocent merchants will claim they aren't sending out any spam. Who do you believe?

      --Sneeper

    2. Re:Why not go after the merchants? by gowen · · Score: 2, Insightful

      Except everyone knows who the US spammers are. Drug importation is a massive business, employing millions of people worldwide. There are only a dozen US spammers individually responsible for nearly all the western world's spam. Your analogy is idiotic.

      --
      Athletic Scholarships to universities make as much sense as academic scholarships to sports teams.
  8. No Free Software radicals allowed by sphealey · · Score: 4, Insightful

    I would be willing to wager a small sum that the only invitees to this meeting will be representative of large, commercial, for-profit software vendors and ISPs. That there will be no representation of/by the Free Software community. And that the FTC will reject any comment not from a commercial software vendor/ISP as having "no standing".

    Just a guess.

    sPh

    1. Re:No Free Software radicals allowed by slashjames · · Score: 2, Insightful

      I tend to agree with your assessment. However, I wonder what they would do if, say, the lead developers of Sendmail arrived. They certainly aren't people of "no standing" with regards to email!

      Yes, I know alternatives such as Qmail and Postfix are out there, but Sendmail is pretty much the standard MTA.

    2. Re:No Free Software radicals allowed by JamesTRexx · · Score: 3, Interesting

      Seeing that about 75% of mail is handled by open source mta's, they can't afford to go with ip, moneygrabbing, patentfilled solutions.
      The only standard that will get accepted will be an open, patentfree one supported by the free software community.
      Any closed or patented ones could only be used between the commercial mta's, so it would have little effect on the amount of spam.

      --
      home
    3. Re:No Free Software radicals allowed by sphealey · · Score: 2, Insightful
      he only standard that will get accepted will be an open, patentfree one supported by the free software community.
      You are insufficiently paranoid ;-(

      How about an FTC regulation banning the use of any MTA which does not have commercial indemnification guaranteed by a licensed reinsurance firm? Because clearly in these dangerous times we cannot trust our e-mail to software written by Communist hippies who might even be from other countries.

      That is the kind of thing FOSS will be facing in the next four years.

      sPh

  9. Another war on.... by Null537 · · Score: 3, Insightful

    That's what I envision.

    "Today, we must fight a war, they clog our mail boxes, they offer us penis enhancements, drugs like v1ag|2a, stuff we don't need, they make our wives leave us for believing we go to porn sites and give out our e-mails to just anyone. Today we start the war against spam"
    -[Insert head of newly formed organization here]

    1. Re:Another war on.... by JamesTRexx · · Score: 2, Funny

      Will precision bombing be optional?

      --
      home
  10. RFC1413 by jcuervo · · Score: 2, Interesting

    Just use ident. Maybe return a little extra information, like an "@sitename" suffix.

    Yes, it would require immediate global adoption, but not if you just assign a higher score (towards spam) to messages that came from sites with no identd running.

    --
    Assume I was drunk when I posted this.
    1. Re:RFC1413 by slamb · · Score: 2, Insightful
      That wouldn't work:
      • It requires a connection back to the originating MTA. Slow.
      • The information returned would be useless - my machine would always say "postfix". Unless you're talking about a new identd linked with the mail server. But that's not what RFC1413 says. It says the "owner of that connection" - that's always going to be postfix.
      • It includes no provision for telling if the machine shouldn't be sending this message at all.

      A good SASL setup, along with SPF, does far, far more for authenticated email. My machine has this: it rejects any inbound email claiming to be from one of my user's domains unless SASL-authenticated as that user. And has SPF records so other servers can reject messages from these domains unless they come from my server. Thus, it's very difficult to forge an email from my users' domains to a server with SPF checking enabled.

  11. A stopgap measure by grasshoppa · · Score: 4, Interesting

    An effective stop gap measure would be for ISPs to block port 25 ( along with a number of others ) outbound by default, and open it up only on customer requests.

    This way, zombie'd machines wouldn't have a chance to spew their virus/spam emails to everyone, I could still run my home email server, and the ISPs would save on bandwidth.

    I wonder why this ISN'T yet in place, to be honest.

    --
    Mod me down with all of your hatred and your journey towards the dark side will be complete!
    1. Re:A stopgap measure by Muerte2 · · Score: 2, Insightful

      The ISP that I work at did exactly that. We were getting on average 2 to 3 complaints a week about spam leaving out network from customer IP addresses. We're a relatively small ISP too! Not to mention the only fix was to call said customer and explain what an open relay/trojan is and then help them fix it. The time required to do this for each customer was pretty horrendous.

      So we decided to block that port outbound for all IPs unless a customer requests it (if they're running a mail server etc...). Very few people even notice, it works out pretty well actually.

  12. Publish SPF now, be the 126519th... by pjrc · · Score: 4, Insightful
    If you want to advocate SPF, publish a SPF record for your domain, and then register it. Already, 126518 domains have published SPF records (at the time of this writing).

    By the time the FTC's summit comes around, it's looking like SPF is going to be pretty well established.

    1. Re:Publish SPF now, be the 126519th... by qtp · · Score: 2, Informative

      I'd like to know how many of those domaines actually are applying effective policies.

      SPF is great for communicating a domain's policy and for allowing the reciever to check for compliance, but this does little if the originating domaine's policy is lax (or worse, "no policy). This brings us back to what I have seen as the heart of the SPAM problem since the beginning, ISPs are all for protecting their users from SPAM, but as soon as you ask them to do something about spam originating from within their domain, they act as if nothing can be done. Only if the ISP is willing to set an effective policy, and is willing to take measures to enforce it, does SPF help to reduce spam.

      That said, SPF does appear to be the most effective and implementable tool that has been proposed for ISPs to use in the fight against SPAM so far. I just hope all of those participating ISPs have admins that are capable of using it effectively.

      --
      Read, L
    2. Re:Publish SPF now, be the 126519th... by wayne · · Score: 4, Interesting
      Actually, I have a list of around 650,000 domains in .COM, .NET and .ORG that have SPF records. These should show up in the SPF Adoption Roll Real Soon Now. Surveys of the .DE and .FR TLDs have also been done, but I don't have the results of those.

      I'd like to know how many of those domaines actually are applying effective policies.

      In the survey of the .COM domains, I found the top ten SPF records to be:

      159416 "v=spf1 mx -all"
      147883 "v=spf1 -all"
      51245 "v=spf1 ip4:10.0.0.0/24 ip4:10.0.0.0/24 ?all"
      28206 "v=spf1 a:smtp.example.net -all"
      21437 "v=spf1 mx ip4:10.0.0.0/19 ~all" ""
      19733 "v=spf1 mx ~all"
      15245 "v=spf1 a:smtp.example.com ~all"
      9488 "v=spf1 ip4:10.0.0.0/24 mx -all"
      6371 "v=spf1 ip:10.0.0.0/24 ip:10.0.0.0/27 ip:10.0.0.0/24 ip:10.0.0.0/27 ip:10.0.0.0/27 ip:10.0.0.0/27 ip:10.0.0.0/27 ip:10.0.0.0/27 ?all"
      5842 "v=spf1 ip4:10.0.0.0/24 -all"
      (I have munged the domain names and IP addresses for privacy reasons.)

      As you can see, it is very common to define strict SPF record with the "-all" at the end. Those domains that use the softfail option of "~all" are somewhat more lax, but still moving in the right direction.

      The complete survey results are available to people who follow the IETF MARID list and/or the SPF discuss list. I'm not going to post a link to them here 'cause I don't want to be slashdotted.

      --
      SPF support for most open source mail servers can be found at libspf2.
  13. Here's the system... by RecycledElectrons · · Score: 3, Interesting

    Every eMail that is sent (by SMTP - the Simple Mail Transport Protocol) should be considered "unconfirmed." This means that it may or may not be from the return address.

    I propose that we add a new layer called CMTP - the Complex Mail Transport Protocol.

    CMTP simply takes an unconfirmed eMail (sent by SMTP) and sends a packet back to the sender. This packet asks for verification of the message. The packet includes a checksum, the length, to, from, subject, and the time/date that the eMail was sent.

    The sending mail server receives this CMTP checks all of that information, and replies with a CTMP confirmed message or a CMTP not confirmed message.

    There is no limit on the number of times that a mail server may be asked to confirm an eMail. There is a limit that messages should not be confirmed more than 24 hours after they are sent. This may pose a small problem in that SMTP does not place a time limit on mail messages.

    CMTP does require that every mail server maintain a list of the eMail it has sent. That COULD be time consuming.

    CMTP also adds 2 packets to every eMail sent. SMTP was designed to be dead simple. They thought that they could not afford 2 extra packets. In that time, eMail was 80% of all internet traffic. Today, eMail is such a small percentage of all traffic that trpilling it would not be noticed.

    Andy Out!

    1. Re:Here's the system... by PitaBred · · Score: 2, Insightful

      For any email server with a moderate load, do you even realize how much computation that is? checksumming isn't a trivial process computationally. Besides, it'd make spam even easier. The checksums, etc. would all be the same, so all I'd have to do is respond with a canned reply to any query on a spam I (theoretically) sent. All the while this imposes a PENALTY on LEGITIMATE mail, because of the necessary individual calculations.
      Nice idea. It has some major flaws, though.
      And according to NetFlow, mail still accounts for 1.19% of all packets, which isn't anything to sneeze at.

  14. As if you didn't already know this was important.. by museumpeace · · Score: 3, Interesting
    Let me undescore the impact the conference is likely to have by pointing out that when NIST speaks, the DOJ listens. Here is a quote from a rejected submission of mine that found other documents NIST has authored that Ashcroft and co. now use.
    Feeding the fascination many /. readers may have for the escalation of technique and counter-technique beteween hackers and computer forensics experts may not be as valuable as keeping clues about how to avoid getting caught out of the hands of the hackers but I just can't resist... Sciencedaily.com pointed me to something hackers and other criminals might want to study carefully: the PDF guidebook that NIST wrote for the DOJ's first responders to computer crime scenes. Though it has John Ashcroft's name at the top, a glance at the document's time line shows that it was authored by experts mostly from outside the DOJ and completed before the current administration's appointments: the imprimatur of Justice Department on the document may not be ironic.

    Drat! I'm gonna get modded for flamebait but with a sig like mine, who'd notice?
    --
    SLASHDOT: news for people who can't concentrate on work or have no life at all and got tired of yelling back at the TV.
  15. Email's role on the net by Schezar · · Score: 3, Insightful

    Let's face it: Email doesn't (and can't) fill the role it used to.

    There was a time when you shared your email address with everyone. It was on your resume, it was on your web page (if you had one), it was in your sig. Email was the universal, simple, fast, reliable communication medium of the internet.

    I used it to get my friends together on a weekend. I used it to organize events and meet people. I used it to share information.

    Nowadays, IM fills that role. I've realized that nearly everything I used to use email for can be done just as easily over IM. It's reliable, fast, relatively secure, easily encrypted, etc... Furthermore, it is largely immune to spam for a number of reasons.

    I find now that I only use email when registering for something (throwaway address), or for confirmation when I purchase something online. Everything email used to do, IM can do (if used properly... Staying online, logging, offline messages, confirmation, not using the AOL client, etc...)

    IM is by-and-large safe from SPAM due to the numerous restrictions placed on its use. Rate limits, authentication, etc... These things provide a layer of security, but also a layer of inconvenience.

    Were email to incorporate such restrictions, it would remove the last reason in the world to even be using it in the first place! Email is completely open. If email were to be restricted, it would become nothing more than a slower version of the current capabilities of IM.

    --
    GeekNights!
    Late Night Radio for Geeks!
    1. Re:Email's role on the net by praedor · · Score: 4, Insightful

      Yeah, right. IM. Pa-leeze. IM requires that the person you seek to contact has their fat ass planted 4-square in front of their computer or leaves it on 24/7. Email is very nice. It works no regardless of the type of client you have. It will sit there waiting for you to check it, perhaps after a vacation, after actually getting off your ass and away from the computer to exercise, or whenever you decide to either fire up the computer or turn on your email client. Oh...IM also requires that your contactee be somewhat in the same timezone (besides sitting on their ass forever awaiting IM messages). Try to IM from California to NYC late in the afternoon. Try to IM someone on the opposite side of the globe.


      IM is cute, it is a nice way to reduce your productivity at work and waste time "chatting" back and forth about unimportant nonsense (movies, your new pants, the hot chick from apartment A, etc). Email ain't going away, and it most assuredly wont be replaced by IM, Jabber, IRC, ICQ, Yahoo Messenger, etc. Email works regardless of software/hardware platform, has not propriatory hooks in it (Microsnot tried with their SenderID scheme to add a proprietory hook into email). Nothing beats email for convenience and easy time-shifing.

      --
      In Bushworld, they struggle to keep church and state separate in Iraq as they increasingly merge the two in America.
  16. No mention of sender pays by gr8_phk · · Score: 3, Interesting

    There was no mention of sender pays postage as a solution. Anything that prevents anonymous email has an inherent central control which the internet doesn't need more of.

  17. FTC A Global Entity? by Muerte2 · · Score: 3, Insightful

    Last time I checked email was a global technology. Am I the only one that thinks it's strange that the (FTC an entirely US organization) is making decisions about something like this? Isn't there a more appropriate internation technology body that should be handling this? Ultimately this will have to become an ISO standard to get implemented across all mail serving platforms. Wouldn't it make sense to get a global consensus before the US starts making decisions about how best to deal with SPAM.

    I live in the US, but if I didn't I wouldn't want the US government telling me how to handle SPAM.

  18. Isn't this a bit too late? by irate_canadian · · Score: 2, Insightful

    I don't know about everyone else - but I hardly notice spam anymore. I mean, between gmail, thunderbird, and even hotmail (obviously not a definitive list) - I don't see it anymore. It's all filtered out automagically. I think this is a case of the government, once again, being a bit too slow on the uptake. Thanks for the thought guys, but we seem to be dealing with it fine ourselves.

  19. Re:Spam solution by realmolo · · Score: 2, Interesting

    Yeah, a few of the webmail providers do exactly what you're talking about. They generally call them "temporary addresses".

    It works, but it makes using email more complicated, and it creates a situation where even MORE e-mail traffic is going to be flying all over the place, mostly to all those diabled temporary addresses.

    What we really need is a single registry for email servers, similar to how DNS works now. If you want to run a mail server (and not have your mail rejected by other servers), you need to "register" it with some big, monolithic organization. If you're not on the authorized list, you get rejected.

    Yeah, that kills the "openness" of email. You'll no longer be able to setup a usable mail server without jumping through some verification hoops. But so what.

  20. Why not do what the RIAA does? by telstar · · Score: 2, Funny

    Why not do what the RIAA does ... and sue the people receiving the spam? Seems like that'd fix the problem ... right? Right?

  21. F/OSS will certainly be a main issue there by wayne · · Score: 3, Informative
    Anyone who attended or watched the videos of last year's FTC anti-spam conference will know that the FTC very much has a clue about the spam problem. They showed far more clue than even the average slashdotter, let alone the general public.

    Not only do I expect many F/OSS people to be allowed in, I expect the concerns of deploying anti-spam solutions in F/OSS mail servers to be front and center. I also expect there to be people who don't give a flip about F/OSS to be there too, along with a bunch of spammers^Wethikal bidnizmen.

    --
    SPF support for most open source mail servers can be found at libspf2.
  22. Proof Of Work tokens and HashCash by speaker4thedead · · Score: 2, Informative

    I'm amazed that I haven't seen more about Proof of work tokens for spam-fighting.

    Proof of work tokens are hashes (like md5's) that take a relatively long time to compute and are very quick to validate. For most purposes, adding a few seconds to the delivery of email is unnoticable. For spammers, however, it greatly decreases the number of emails that can be sent out within a period of time.

    Even though this does not completely eliminate the problem, it can significantly reduce the amount of time spent sifting through spam. Used in combination with public-key cryptography, it could even allow for mass-mailings from known users. (For instance, the Red Hat mailing list.)

    The current problem with spam is a result of the fact that it takes almost no money to send spam. Increasing the amount of time spammers need to use in order to send out email is the only way to make a dent.

    Links:

    HashCash.org

    Reusable Proofs Of Work
    Currently down, but look at the google cache

    --
    "My religion is to live --and die-- without regret." -- Milarepa