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Spam

Tracking Spam to the Source 366

cygnusx writes: "MSNBC is carrying a Wall Street Journal article on one reporter's attempts to track the spam she receives to the source. Armed with a few Hotmail and Yahoo accounts, reporter Stacy Forster actually responded to most of the barrage of spam she began to receive after a week or so. Not quite the best investigative jounalism ever seen, but still a good glimpse (or so I thought) at those who send us those unloved missives about "exciting business opportunities" and "millions of $$$ waiting"."
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Tracking Spam to the Source

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  • Recommendation (Score:5, Informative)

    by doorbot.com ( 184378 ) on Saturday February 09, 2002 @04:51PM (#2980063) Journal
    The article says the FTC recommends that you forward all of your spam to uce@ftc.gov. I know I will be doing so from now on...
  • by Flavio ( 12072 ) on Saturday February 09, 2002 @04:56PM (#2980080)
    ... was to install Spambouncer [spambouncer.org], which is a large set of procmail filters.

    Before installing it, I got ~20 spam messages a day. Now I get at most 1-2 a week. Spambouncer does come with very restrictive default settings, though. For example, you must specify if you want to receive email from free web mail services like Yahoo and Hotmail, otherwise it'll filter those out.

    It also logs everything it does and has the option of sending blocked email to a file instead of /dev/null in the case it filters something it shouldn't.

    In my case the only inconvenience was it blocked legitimate email from Amazon.com and eBay -- these are filled with disclaimers and have HTML, which Spambouncer doesn't like to see. In any case, it's easy to mark those domains as safe and start receiving their email again.
  • Harris Poll/MS spam (Score:2, Informative)

    by dickens ( 31040 ) on Saturday February 09, 2002 @05:00PM (#2980090) Homepage
    Anyone else received an unsolicited email inviting them to participate in a Harris Poll for Microsoft ? Sort of a "how are we doing" type of thing ?

    It took a little guts, but after 2nd and 3rd thoughts I reported it via spamcop.

    Not sure if I'll take the poll anyway. I think it sucks that MS has me on their list. Maybe they scraped microsoft.public.???.
  • by oregon ( 554165 ) on Saturday February 09, 2002 @05:01PM (#2980093) Homepage
    NEVER look into an e-mail that even looks like spam

    Absolutely, these HTML mails are dangerous with their 1x1 gifs with a custom URL so "they" know you've read the message.

    I check the source and add the urls to junkbuster's list. If the filters don't get the mail, then the images still don't get requested.
  • from the story.. (Score:2, Informative)

    by Suppafly ( 179830 ) <slashdot@sup p a f l y .net> on Saturday February 09, 2002 @05:14PM (#2980123)
    The FTC encourages consumers to forward unsolicited commercial spam to uce@ftc.gov.

    Guess I have someone else than abuse.net to forward unsolicited spam to now..
  • by oregon ( 554165 ) on Saturday February 09, 2002 @05:20PM (#2980148) Homepage
    Borders and Yahoo just said they didn't sell the address.

    The spammer said he used "an e-mail harvesting program called Target 2001 ... [which] ... scans Web sites and databases for addresses ."

    So it is possible that neither Borders or Yahoo are lying ... but that there is a security/privacy flaw in one or both of the sites which lets the address be harvested.
  • by Seth Finkelstein ( 90154 ) on Saturday February 09, 2002 @05:21PM (#2980154) Homepage Journal
    Quoth the writer:

    In only one of the e-mail accounts, I provided all of the information requested (name, address, demographics, etc.) during the registration process, and I used this e-mail address just one time - to purchase a gift certificate from Borders.com. Less than a week later, the spam started rolling in - jamming the in-box with more spam than the other new accounts I had created.
    The writer seems to think spammers couldn't get the address unless they got it from Borders.com. This may be unfair. What spammers sometimes do is to dictionary-attack ISPs, trying lists of usernames (after all, what do they care if the mail bounces - it's not like it's THEIR problem ...). Once they find an address works, (by not having it bounce), they sell it to other spammers as a "verified" address. I saw something similar happen where an account I only used to received a few mailing lists (never send) suddenly received a huge upsurge in spam. The list-maintainers were above reproach, they hadn't sold the user list. What seemed to have happened is that spammer found the address in a dictionary-attack, and then it was all over ... :-(

    Sig: What Happened To The Censorware Project (censorware.org) [sethf.com]

  • by stego ( 146071 ) on Saturday February 09, 2002 @05:26PM (#2980180) Homepage
    Select Message->Bounce to Sender, or Option-Command-B if you do this often...
  • by Tabercil ( 158653 ) <tabercil@gmail.TIGERcom minus cat> on Saturday February 09, 2002 @05:35PM (#2980215)
    My dad was complaining bitterly about the volume of spam he was getting as a result of signing up to get a online greeting card (no I don't remember which site) since he's on a dialup account with fixed number of free hours each month. Downloading and deleting the spam effectively ate into his hours. A quick installation of Mailwasher [mailwasher.nett] (which serves to send messages back marking it as undeliverable) served to quiet him afterwards since he now feels like he's doing something to stop it.

    What I think I might want to check is to see if it can't also directly forward the original email to that ftc mail address...
  • by eznihm ( 552487 ) on Saturday February 09, 2002 @05:50PM (#2980257)
    don't forget this [slashdot.org]
    and there exist tools like wpoison [google.com] (the better one i came across while googlewhacking escapes me) that do exactly what you're talking about
  • by Em Ellel ( 523581 ) on Saturday February 09, 2002 @05:50PM (#2980258)
    A year or two ago I came to the conclusion that you cannot stop all the spammers using filters. You can use any filtering program you want, but either you going to loose some e-mail or some spam will get though (or both). You can use fake e-mail addresses but many sites now-days check by sending you a confirmation e-mail that requires you to do something with information you get in the e-mail. But what you CAN do is control how they get your e-mail address in the first place.

    Here is my easy method to track the bastard that sold your address. All you need is your own domain and control over the e-mail server - as many of my fellow geeks do.

    Using my domain - I created an account for dealing with spam. I then created an alias which will put all e-mails without a specific mailbox into that account. (for example - the qmail/vmailmgr allows you to create "+" alias as such catch-all address)

    Now comes the fun part- every time I need to use my e-mail in public - I make up an e-mail address that makes it easy to figure out where I used it. To make sure I do not create a real mailbox with same name - I use a specific prefix (like ns- for no spam) to make all of those e-mail addresses stand out (example - when signing up for e-bay, I sign up with ns-ebay@mydomain.com. Now when that spam arrives I can find out which e-mail address it is destined to - and which place it came from.

    The last part of this comes after a while. Eventually some addresses start getting too much spam and you seem to end up where you started. No problem. I create a new alias that bounces or /dev/null's email coming into that account.

    If I find that I gave out an address to a trustworthy source, I can even create an alias to go to my main mailbox.

    Of course, if you go to a source that is guaranteed to leak your address to spammers, no point to even bother with all this - that's what the free webmail accounts are for ;-).

    The interesting part of all this is that to my own surprise I find that most sites are pretty good at keeping your privacy when you sign up. So far the biggest culprits were postings on USENET (well, duh!) and ebay - but e-bay were all from massmailings by people I bought from and they were good at removing my address when asked to.

    Hope this helps.

    -Em
  • by Bender Unit 22 ( 216955 ) on Saturday February 09, 2002 @05:53PM (#2980267) Journal
    Yes, it has been done.
    And some of the email harvesters have routines that tried to detect fake email pages. But of course if the fake page is not overdone, it might still fool them.

    Anyway When making web pages, I like to make people's emails on the page a a small .png file instead of text with no mailto: link. This prevents that these programs can pick it up. But people can't just click on your email adr. to send a mail.
  • Filtering (Score:3, Informative)

    by HRbnjR ( 12398 ) <chris@hubick.com> on Saturday February 09, 2002 @05:58PM (#2980275) Homepage
    I use procmail to filter out email from anyone not in my address book to a different account. That way I can check the spam account once a day, and won't be bothered the rest of the time.

    I export the email addresses in my address book to a file which I FTP to my server. Here is the procmail recipe I use on the server:

    -------
    SHELL=/bin/sh

    FROM=`formail -rzxTo:`

    :0
    * ! $FROM ?? .*myisp.com
    * ! $FROM ?? .*networksolutions.com
    * ! $FROM ?? .*otherimportantdomains
    * $ ! ? cat emaillist.txt | fgrep -iqs "$FROM"
    ! spam@account.com

    ----
  • by Osty ( 16825 ) on Saturday February 09, 2002 @05:58PM (#2980278)

    If you are absolutely sure that you are getting popunders from msnbc, then why the hell am I not getting them! I hate feeling left-out.

    MSNBC does random popup ads, in that not every time you load the page will an ad be displayed, but if you browse around on the site enough, or just get unlucky, you'll get a pop-up. I'm not sure I've ever seen a pop-under ad on MSNBC, but then I use a combination of Adzap [zip.com.au] with my Squid proxy and NoPopIE [daishar.com] with Internet Explorer to banish most advertisements and popups. You may be using similar things, if you're never seeing popups on MSNBC

  • by Anonymous Coward on Saturday February 09, 2002 @06:03PM (#2980287)
    Who sends you "real" email? I get HTML all the time from business contacts (customers) on various corporate mail systems.

    Note that the *default* setting of Mozilla/Netscape/Outlook is to send HTML mail. People aren't going out their way to make your (our) lives difficult with HTML -- it's accepted as the standard now. And I've got better things to do than try to argue with the world about mail formatting, esp when they are paying me or sleeping with me. Punching myself repeatedly in the balls would be more productive.

    (Although Hotmail is really fucking annoying in that it only sends text/html without the text/plain backup. That sucked when I was using an elderly version of pine as a remote mail solution.)
  • by krogoth ( 134320 ) <slashdot AT garandnet DOT net> on Saturday February 09, 2002 @06:24PM (#2980336) Homepage
    If you don't render HTML, this doesn't happen. In KMail you can render HTML without loading external objects.
  • A simple solution (Score:5, Informative)

    by Anonymous Coward on Saturday February 09, 2002 @06:26PM (#2980341)
    If you have your own domain name, simply use abuse@yourdomainnamehere.com as your primary e-mail address and you'll never be spammed. After 3 years I am still waiting for my first spam
  • by walt-sjc ( 145127 ) on Saturday February 09, 2002 @06:34PM (#2980365)
    Bouncing spam after it's in your inbox is useless. Since most spam is forged, all this will do for you is get you another email from "Yahoo" (or whoever the spammer used as a forged address) claiming the user is unknown.

    Spam has to be bounced at the SMTP server level before reception is complete to be effective at all, and even at this point it's usually pointless as the spammer is probably just bouncing off some random open relay in China. All this will do is fill up the clueless administrators mailbox of the relay in china with bounce messages. Maybe this will cause them to close their open relay, but with hundreds of thousands more open relays to choose from, it does little good in the overall picture.

    Spammers have found another method too. Relay through some lammer's poorly-configured wingate or squid proxy.

    Use spamcop, bounce messages, write nasty notes all you want, but you will not make a dent in the spam problem.

    The only thing you can do that might have ANY impact at all would be to complain to your congressmen that they need to outlaw spam. Once laws are in place we can sue the pants off these assholes, and maybe even get them some jail time.

    What scares me more than the "make money quick" or "loose 150 lbs in 10 minutes" spams are the pseudo-legit type used by businesses.

    Think about that... If only 1% of american businesses decided to use spam, and they only sent one spam email a year to 1% of the population,
    that's still thousands of messages A week per person!

    With all the filters I have setup, I block about 600 spam attempts per day to my server, another 50 or so a day get filtered into a spam folder automatically, and about 2 or so a day get all the way through to my main inbox folder. This is on an email address I've had for 7 years, so just about every spammer seems to hit it.

    Considering that I only get about 100 legit emails a day (including several mailing lists) I'd say the problem is WAY out of hand. With the levels of spam increasing about 10% per month, my guess is that we have about a year left before email is completely saturated with spam making it impossible to communicate.

    So Please, do as I have and write a physical letter (no emails, they just junk those) to your congress critters (or what ever government officials you have in your country that pass laws) to ban spam.
  • by Floyd Turbo ( 84609 ) on Saturday February 09, 2002 @06:39PM (#2980376) Journal
    There's a column in today's Washington Post [washingtonpost.com] on spam:

    I arrive at my office, uncap my coffee, unwrap my bagel, open my e-mail and face the first searing public policy question of the day: "Do you want to watch teens make their first porn video?"

    It's called "The Great American Spam Attack" [washingtonpost.com], by Ellen Goodman.
  • by nasalgoat ( 27281 ) on Saturday February 09, 2002 @06:52PM (#2980411) Homepage
    And the article is fairly accurate - we cut off affiliates who spam pretty quickly and block access to their reseller code.

    However, such programs generate incredible amounts of traffic - the money generated far exceeds the bad publicity and attention the occasionally poorly targeted email generates.

  • Re:Recommendation (Score:4, Informative)

    by kinko ( 82040 ) on Saturday February 09, 2002 @07:08PM (#2980455)
    I'm not even an American, and I know this one... they don't want ALL spam. They only want spam that is in some way fradulent or illegal - eg pyramid schemes.
  • Accessibility? (Score:2, Informative)

    by yerricde ( 125198 ) on Saturday February 09, 2002 @08:05PM (#2980586) Homepage Journal

    When making web pages, I like to make people's emails on the page a a small .png file instead of text with no mailto: link. This prevents that these programs can pick it up.

    It also prevents that blind people using a speech reader can pick it up, which may be a violation of your jurisdiction's disability code.

  • by antichef ( 557824 ) on Saturday February 09, 2002 @08:50PM (#2980692)
    spamgourmet [spamgourmet.com] is a good (open source) inline disposable email address filter that does *not* require you to set up each address specifically on the site -- instead, you simply remember the syntactic rule for disposables and make them up when you need them. You can then track how spammers got your address, or simply let the disposables get used up and not worry abou it.

    The idea is to set you free to surf/sign up at will and make it easier to not get spam than it is to get spam.

  • by The Famous Brett Wat ( 12688 ) on Saturday February 09, 2002 @10:25PM (#2980934) Homepage Journal
    You mean like E-Stamps [templetons.com]? Or perhaps you'd settle for a non-monetary payment like Hash Cash [cypherspace.org]? I don't believe that either of these systems can prove to be very useful, because spammers simply won't adopt them. You can start refusing mail from everyone who doesn't support them if you like, and that will certainly solve your spam problem, because the chances are you won't get any mail anymore.

    In my experience so far, the only way to run a fairly spam-proof SMTP server is to be utterly ruthless with blacklisting. Blacklist insanely large portions of IP space, but configure your SMTP server to produce a bounce message which describes a way around the block (like a postmaster address, or something). A legitimate sender should receive and read the bounce (unless they have one of those ghastly SMTP servers which discards error message text and "helpfully" translates it into "the user does not exist"), whereas a spammer is likely to ignore it. If someone responds to the bounce message in the manner described, whitelist the associated IP address. Spammers send out so much mail that they can't attend to every bounce message personally. (And contrary to some opinions I've seen expressed elsewhere in this article, I've yet to see any evidence that spammers remove addresses which consistently bounce.)

    Another possibility is to use the "MAIL From:" address: construct a whitelist of names from whom you will accept mail, and bounce all the others with a similar "how to get around this" message. As before, add the address of any such person who reads the bounce message to your whitelist. Note that both of these techniques could, in principle, be automated. Note also that although a spammer can trivially forge the "MAIL From:" address, it's not nearly so trivial to match every "RCPT To:" address with a whitelisted "MAIL From:" address.

    I don't pretend that the above approach to spam-blocking is polite, but rather that it's the only one I've found to be very effective, given the limitations of SMTP. Most people are quite horrified at the number of IP addresses I blacklist: one spam from an open relay is usually enough to convince me to blacklist that IP address at the class B level (approx 65,000 IP addresses in its neighbourhood). It's not about raw numbers, though: it's about the impact that it has on your mail service. If I'm never likely to receive a legitimate email from that IP range, then why not blacklist it?

    Ultimately, though, the solution will be to replace SMTP with a protocol that recognises one simple fact that SMTP does not: parties engaging in mail exchange are potentially hostile to each other, and thus the protocol must only allow progress when there is mutual agreement between the parties that the transaction should go ahead. IM2000 [cr.yp.to] is an interesting and potentially useful proposal, for example, albeit a bit short on details (and stagnant, judging by the recent lack of traffic on the mailing list). As it happens, I've chosen to make this problem (replacing SMTP) the subject of my Honours thesis, and that's due to be finished by July. Whether or not my proposals will actually be adopted by anyone is a different matter, of course.

  • by Moderation abuser ( 184013 ) on Sunday February 10, 2002 @09:24AM (#2981866)
    http://www.yelm.freeserve.co.uk/spamido/

The key elements in human thinking are not numbers but labels of fuzzy sets. -- L. Zadeh

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