Main arguments made thus far and my retorts. A1: Any one who tries to work on anti-spam is a "Kook". R1: Illogical A2: Too difficult for legitimate bulk senders to implement and support, and "especially" mailing lists. R2: Many, if not most, mailing lists are already provided in "pull" www format. Since they already implemented the complexity to pump incoming emails into www, it is trivial in comparison to cc: a copy to a POP account. A simple .procmail script could be written in 5 minutes. A3: Spammers will use mailing lists to send. R3: They already do. Receivers can opt out of mailing lists (before and after my proposal). Without my proposal, they can opt-out of all bulk email, which includes spam and legitimate bulk email, and they can selectively whitelist to opt-in (I showed how this whitelisting can be spoofed by a spammer). With my proposal, they can additionally opt-out out all spam == which is now all bulk email, and selectively opt-in (via "pull") to mailing lists (which is a concurrent operation with subscribing, not a separate subvertable whitelist). With my proposal, receivers will get less spam, because their email address is only selectively opted-in, instead of open to all spammers. Additionally, with the inherent "pull" delay, mailing lists can effectively remove spam from the "pull" server as it is discovered, well before most receivers "pull" it. Additionally, mailing lists already have mechanisms in place to defeat incoming spam and will be developing more, given their advantage of requiring membership (subscription). So all in all, under my proposal spammers will be less successful. A4: Status quo is better risk. R4: Timeline curves project spam will keep increasing and eventually most email will be spam. Unless effective filters can be done and maintained with the status quo paradigm, you will eventually have 1 legitimate email for every 10s or 100s of spams. I know people who have this scenario already. At that point, the legitimate bulk email isn't getting read whether it is filtered actively or inherently (burried in spam). Without my proposal and with this eventual outcome, receivers will be forced to use "pull" for mailing lists (e.g. www archives) while their general email remains broke. If you think current filters are effective, then why are so many receivers complaining about spam? I know there are filters which work somewhat, but either their cost model can apparently not scale to all receivers (e.g. BrightMail because they use humans to help filter), or the filter can be subverted with varying content or whitelist mining (e.g. DCC), or the filter can be subverted by adapting Bayesian footprint, or the filter can be subverted by whitelist mining and filter causes big delays in legit email (e.g. email-back whitelisting verification), etc... The point is legitimate bulk email is going to end "pull" whether by design or by failure of general email. I prefer by design. A5: Receivers will not "pull" legitimate bulk email R5: They will if there is no other way to get their email. See R4 above. By design or by failure of general email, the problem is going to collapse either way into "pull"ing legitimate bulk email. I prefer by design. A6: POP is not ubiqutous enough. R6: Use any and as many "pull" protocols as you want to serve your readers. I'd say POP and www are sufficient, but use as many as your receivers want. Let your market decide what you provide. A7: Some people in this list are against because they have vested interest in status quo for mailing lists R7: Without logical basis on the internet as a whole (this is IETF), that would not be a sound engineering basis to stifle an idea. A8: Usenet already exists R8: Use Usenet to provide pull if that is what your receivers want. I think most would prefer to send and recieve in their email client, so I think POP would be more popular. A9: Separating legitimate bulk email into "pull" will not cause additional enforcement against remaining spam == all bulk email R9: There is going to be continuing increase in enforcement whether you implement my proposal or not. Either active enforcement or inherent (lost in pile of spam). There is a fundamental science to this. It is called information theory and one of the theorems is that as you increase noise, then unless you can filter the noise, receiving original signal becomes less reliable. The response rate of spam at < 1% (figure I've seen is usually < 0.003%) means it is noise. Reading (receiving) of all email will get more and more unreliable, as spam increases. Just imagine the bandwidth it will take to download it, store it, process it, not to mention try to filter and read it. Spammers will get more and more savvy at subverting filters, as filters become more and more successful and popular. Spammers will increase spam, the more that filtering increases. It is a race to the saturation point where no information can be sent reliably via email. With my proposal, at least active enforcement can go after all bulk email without having to worry about also killing legitimate bulk email. And with my proposal, at least receivers can receive their legitimate bulk email with reduced spam (see R3) and can "pull" it without wading thru all spam incoming on a "push" email account (again see R3). And with my proposal, at least receivers know that someone is spamming them, and not honoring their request for "pull" (opt-in). There are many other benefits... A10: Separating legitimate bulk email into "pull" does not separate it from spam R10: See R3 Did I miss any relevant arguments made thus far in this thread? Shelby Moore http://AntiViotic.com