Ki Song write: >So, basically, the server should not be the bottleneck. If anything, the >connection, dns/mx lookups, remote mail servers, etc. those are more of a >factor than the actual postfix server. in general, correctly configured modern MTAs offer virtually identical performance. sendmail, exim, postfix, and qmail all can move messages within epsilon of each other if they are setup properly. the principal constraint on the server will be the quality of the disk subsystem, as all the MTAs will end up disk bound (assuming unlimited outbound bandwidth.) additionally, name server performance is a big deal, and you can really screw up your outbound performance if you don't attend to having a proper caching nameserver either resident on your outbound mail host or on the local LAN. richard
