lst_ho...@kwsoft.de put forth on 3/4/2011 3:33 PM: > BTW, is there any "how-to" for getting the least possible memory > footprint for Postfix.
> - don't use regex/pcre maps This isn't necessarily true, is it? In some cases I would think it's dramatically reversed in favor of PCRE tables (unless the Postfix PCRE processing code overhead eats up a massive amount of memory). For example, with the following single PCRE I can block a few million, literally, residential hosts in the Centurylink (formerly Embarq) consumer broadband aDSL network: /^.*\.(dyn|dhcp)\.embarqhsd\.net$/ REJECT Please use ISP relay To do this with a CIDR would take at least 100 entries to cover all the subnets, probably many many more, due to the way they assign blocks by state, and rDNS by customer type, with (dyn|dhcp|sta) all existing within each of the top level parents. To do this with a hash table would require multiple hundreds of entries as you'd be limited to using /24s. -- Stan
