From: "Thomas Bitschnau" <typo3@xxxxxxxxxxxx>
> Hi!
>
> On Mon, 2004-07-12 at 21:56, Dave Pawson wrote:
> > older processor, I'm getting similar (long) times.
> > Any info on 'DNS-Tests' please?
>
> I think it's this:
>
> "This works by analysing message text and HTML for URLs, extracting the
> domain names from those, querying their NS records in DNS, resolving the
> hostnames used therein, and querying various DNS blocklists for those IP
> addresses. This is quite effective."
>
> And "querying various DNS blocklists" costs a lot of time, i think.
> Without it for me the spam-detection rate is slightly worse, but my
> client sometimes got stuck, because they took to long. Now I have 3
> spam-messages, out of 250 a day, coming through, which I can sort out by
> hand.
Do note that some of the black lists that are in the default SpamAssassin
configuration have ceased to be updated and others have ceased to exist.
So DNS timeouts are a recurring problem for new users who do not vet their
installation carefully.
{^_^}
