On Sat, 12 Jun 2010 13:06:23 +0200 Karsten Bräckelmann <guent...@rudersport.de> wrote:
> No need to stretch the term "large". That's a throughput of more than > 1 mail per second -- 100k SMTP connections per day. And that is > without any local caching at all. With caching, the throughput would > be considerably higher, before you ever cross the threshold and get on > their heavy-user radar. I think it's worth pointing-out that SA does deep-checking on zen to catch spammers in SBL that are relaying though other people's servers. If you reject on zen at the SMTP level you not only do fewer lookups, but you should also get a higher hit-rate at the DNS cache.
