Re: spam list

david20_at_alpha2.mdx.ac.uk
Date: 06/24/04

  • Next message: Gerard Bok: "Re: Cryptography problem" 
    Date: Thu, 24 Jun 2004 10:08:51 +0000 (UTC)

    In article <40D94D36.3CA8852A@ieee.orgies.invalid>, Lassi =?iso-8859-1?Q?Hippel=E4inen?= <lahippel@ieee.orgies.invalid> writes:
    >ttcdr wrote:
    >>
    >> Does any one know a website or whatever have spam list
    >>
    >> Users on my company always got spam emails.
    >> I want to use filter them out on our email server.
    >>
    >> Any idea?
    >
    >Filtering by source won't help, because the spam messages have fake
    >headers. Try filtering by content. Since I get my salary from Nokia
    >(even now when I'm on summer vacation), I'm expected to suggest the
    >Nokia Message Protector as the solution...
    >
    However if you are running a mailserver at your frontdoor then the ip address
    of the system connecting to your server in order to pass on the mail message
    will be known irrespective of whether any of the headers have been forged.

    Many spammers will send directly or via open-relays hence these lists are
    useful and do in fact block tons of spam. Content scanners (such as the free
    SpamAssassin) are a relatively recent development whereas these lists have
    been successfully used for quite some time.
    Many ISPs also publish the ip addresses assigned to their dialup connections
    on lists such as MAPS DUL. This allows you to block direct connections from
    such systems only accepting mail from the ISP's mailservers which will
    hopefully have been virus scanned. (Although it is possible for an ISP to scan
    outgoing mailthrough their mailserver for SPAM what they should do with such
    mail is much more problematic than with viruses since unfortunately one
    person's SPAM is another person's important mail message.)

    Ideally you want to use both lists and content scanning.

    David Webb
    VMS and Unix team leader
    CCSS
    Middlesex University

    >-- Lassi

  • Next message: Gerard Bok: "Re: Cryptography problem"

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