First, thanks Steve and Glynn for the feedback! As Steve pointed
out, this news (that friendly handling handling of
non-subscriber posts is feasible again) should be announced more
broadly, we just figured running it by this list (portal savvy
audience) for feedback 1st would be best.
So as Derek just pointed out, today we implemented (more
specifically, Mark implemented) global discarding of really
obvious spam on the opensolaris mail server.
If you're interested in implementation details, see:
http://www.postfix.org/header_checks.5.html
In short, after messages pass through the SpamAssassin (SA)
filter, they're handed back to Postfix, and using its
header_checks and regexp capability, Postfix looks for messages
that SA scored 9 or higher and discards them. They never reach
Mailman.
Relative to my previous instructions (included below), this
means the 2nd step is rendered redundant. That is, the step that
sets "Spam Filter Regexp" to discard messages with an SA score
of 10.
Eric
On Mon, 8 Oct 2007, Eric Boutilier wrote:
> Basic spam filtering with SpamAssassin is now running on the Mailman server.
> This provides mail-list administrators the option to reinstate "friendly"
> handling of non-subscriber posts w/out suffering from spam overrun.
>
> Here's how:
>
> - In the Privacy -> Sender Filters screen, change the
> generic_nonmember_action option from reject or discard to hold. (In my
> experience, this is generally the preferred way for mailing lists to handle
> posts by non-subscribers.)
>
> - Then, to minimize the number of spam messages you'll have to inspect as a
> result of the above change, go to the Privacy -> Spam Filters screen, and
> enter the following:
>
> Spam Filter Regexp: ^x-spam-level: \*\*\*\*\*\*\*\*\*\*
> Action: "Discard"
>
> This will automatically discard all messages with a SpamAssassin score of 10
> or higher. You'll still have some spam getting through to the moderation
> queue that you'll have to discard by hand, but we're confident that setting
> the level at 10 practically guarantees you'll have no false-positives
> (legitimate messages being automatically discarded as spam).
>
> Note also there's another key improvement in spam handling that came with the
> recent upgrade to Mailman version 2.19. The moderation (held messages) screen
> now has a option called "Discard all messages marked Defer". Use this when
> all the remaining messages in the moderation queue are spam. It'll discard
> them all at once.
>
> Eric
>
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