Re: [9fans] spam protection vs. secondary mx'es - Plan9

This is a discussion on Re: [9fans] spam protection vs. secondary mx'es - Plan9 ; I just gave up on secondaries, my ISP and my smtp server are pretty reliable and as you say the advantage is not worth the extra spam. I starting using Gabriel's spf code today, nothing worth reporting yet, but I ...

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Thread: Re: [9fans] spam protection vs. secondary mx'es

  1. Re: [9fans] spam protection vs. secondary mx'es

    I just gave up on secondaries, my ISP and my smtp server are
    pretty reliable and as you say the advantage is not worth the
    extra spam.

    I starting using Gabriel's spf code today, nothing worth
    reporting yet, but I am hopeful.

    I am also trying to use ratfs(1) to validate reverse
    IP addresses so I can reject spam from DSL machines. This
    is a shame but seems nescessary.

    -Steve

  2. Re: [9fans] spam protection vs. secondary mx'es

    On Thu, Nov 30, 2006 at 08:53:41PM +0000, Steve Simon wrote:
    > IP addresses so I can reject spam from DSL machines. This
    > is a shame but seems nescessary.


    It really isn't.

  3. Re: [9fans] spam protection vs. secondary mx'es

    On Thu, Nov 30, 2006 at 06:16:28PM -0500, Michael Batchelor wrote:
    > William Josephson wrote:
    > >On Thu, Nov 30, 2006 at 08:53:41PM +0000, Steve Simon wrote:
    > >>IP addresses so I can reject spam from DSL machines. This
    > >>is a shame but seems nescessary.

    > >
    > >It really isn't.

    >
    > It really isn't a shame, or it really isn't necessary?


    It really isn't necessary -- in fact it is actively
    harmful as there a number of people (including some on
    this list!) from whom I want to receive mail and who
    send mail from DSL connected machines. Every so often
    I consider more agressive filtering, but have found that
    greylisting plus careful use of SMTP call back plus SPF
    plus bayesian filtering kills all but a very few spams.
    Actually, almost all of the occasional spam I do get
    are via mailing lists at MIT and Princeton, so even if
    the spam does originate from DSL and Cable modem
    connected machines, it doesn't much matter by the time
    it gets to me since I'm not going to dig through the
    headers automatically.

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