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> > 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.