spamassassin question

Vernon Schryver vjs@calcite.rhyolite.com
Thu Dec 18 16:03:22 UTC 2003


> On Thu, 2003-12-18 at 07:05, Cami wrote:

> > How does one configure SpamAssassin to query only 1 specific DCC host/ip?

> From: Sven Willenberger <sven@dmv.com>
>
> Actually one would configure dccifd (or dccproc if you are using the
> older versions of SA) to use one specific DCC host via the cdcc control
> program. Create or modify the map file to use only one host. This may
> not be an optimal solution as any failure on that one host to respond
> kills the dcc_check test.

Exactly.  You could use something like

    cdcc "add dcc.example.com"

to add to the /var/dcc/map file.  and 

    cdcc "delete dcc.domain.com" 

to remove entries.  You could use IP addresses instead of host names.

As Sven says, that's probably not a good idea.  It is probably better
have plenty of servers available, but steer to preferred servers with
the RTT adjustment kludge.  For example

   cdcc  add dcc.example.com RTT-1000 ms"

will make round trip times to the DCC servers with IP addresses among
dcc.example.com appear 1000 milliseconds better than they really are.

It is also a good idea to assign and use DCC client-IDs for high volume
DCC clients.  Anonymous DCC clients are penalized 50 or more milliseconds.
They are also rate-limited much more than known DCC clients.


Vernon Schryver    vjs@rhyolite.com



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