Re: [cobalt-users] Sendmail features

["Rich LaBo" <rlabo@xxxxxxxxx>]

> On Monday 14 April 2003 04:42 pm, James A. Dory wrote:
>
> For those who are "curious":
>
> > ># DNS based IP address spam list bl.spamcop.net
>
> ## Comment line
>
> > >R$*                             $: $&{client_addr}
>
> ## Call internal sub-routine "client_addr" to Map host connection to
> ## its logical IP address
>
> > >R::ffff:$-.$-.$-.$-             $: <?> $(host
$4.$3.$2.$1.bl.spamcop.net.
>
> ## If this IP is IPV6, check if the last four octets are listed (in
reverse)
> ## at bl.spamcop.net DNS (should return 127.0.0.X if listed)
>
> > > $: OK $)
>
> ## no entry at bl.spamcop.net is OK here
>
> > >R$-.$-.$-.$-                    $: <?> $(host
$4.$3.$2.$1.bl.spamcop.net.
>
> ## If this IP is IPV4 notation, check if the IP (in reverse) is listed
> ## at bl.spamcop.net DNS (should return 127.0.0.X if listed).
>
> > > $: OK $)
>
> ## If not listed this is OK here
>
> > >R<?>OK                          $: OKSOFAR
>
> ## If the result of any check "above" is OK, then IP address is ok to
accept
>
> > >R<?>$+                          $#error $@ 5.7.1 $: "Spam blocked see:
>
> ## If any IP test above is "true" (meaning the IP was listed and an "ip"
was
> ## returned from the call) then send the client (remote IP ) an error
letting
> ## them know they are blocked by the appropriate BL.
>
> IP in reverse means that IP address 1.2.3.4 gets queried as
> 4.3.2.1.bl.spamcop.net which is how RBL (real-time block-lists) do the DNS
> entry.  That way you can do things like NJABL (and others) does which says
a
> return of 127.0.0.2 is open relay, a return of 127.0.0.3 is proxy; etc,
etc,
>  etc...

How can I verify that this part of the sendmail configuration is working?
Sendmail seems to be working fine otherwise.