replies below
> > so, that box can handle with postfix's default settings, 10000 users?
> > that's
> nice to know. thanx.
> > we wont be going to that size.
> >
>
> the problem you will have is not on the postfix side. content filters
> and imap are more hungry.
noted.
> >> one has working recipient validation, and subscribes to a SpamHaus
> >> data-feed for local zen.spamhaus.org lookups. With just 1500 users,
> >> the public RBL mirrors may be sufficient.
> >
> > i have been thinking of using sorbs instead of spamhaus because sorbs
> > allows
> sites with upto 100k user to connect to them but with spamhaus u are limited
> to
> 100users max. Sorbs has a detection rate of about 68% and i was thinking of
> beefing our spam wall with grey listing.
> >
> > Do u have any suggestions about this?
>
> where did you get the 100 users limit for spamhaus? spamhaus have no
> idea how many users you server, they only watch dns queries, which are
> related to how many messages you receive (minus those you reject before
> DNSBL query, minus caching when the same IP tries again). And besides,
> 100 is ridiculously low.
its on their website. i saw it ... but cant seem to locate it now. but what i
got today was;
Your use of the Spamhaus DNSBLs is non-commercial*, and
Your email traffic is less than 100,000 SMTP connections per day, and
Your DNSBL query volume is less than 300,000 queries per day.
So, guess its ok.