Re: [cobalt-users] Black-Hole Via Sendmail

[Parker Morse <morse@xxxxxxxxxxx>]

On Monday, Sep 29, 2003, at 01:02 US/Eastern, Santiago Montalvan wrote:
> I found this http://www.nuonce.net/cobalt-smtp-blackhole.php and I 
> have been
> thinking about applying this to our Qube3, is this a good idea?  Has 
> anybody
> else done it with a Qube3?  Did you block a lot of actual real e-mails?

I've done something similar with our Qube3: see 
<http://bluebird.sinauer.com/~morse/cobalt/>.

Whether or not you block "a lot" of legitimate mail depends a lot on 
which list(s) you choose to use and what kind of places you get mail 
from. We get a lot from .edu domains, many of which have quirky mail 
systems, so we had a lot of legitimate mail bounced when we used 
multihop.dsbl.org. You have to be willing to experiment a bit.

However, given that our Qube3 stopped accepting mail twice over the 
last 24 hours because the load average was too high... and both 
occasions happened when there was nobody in the office to use 
legitimate services!... we simply don't have the resources to filter 
all the spam we're getting, even using spamd/spamc. The only way we can 
keep our metaphorical head above water is to block-list aggressively.

pjm