> The MTA has to be able to receive 50k/second in bursts and get them out > as quick as possible. Probably not as fast as coming in but from what I > understand delivery speed is important. > It's coming from some sort of SQL server that they say can deliver it > that fast.
Don't think one server. Think multiple, less powerful servers. 50k unique messages a second isn't a realistic goal from a single server. Theoretically, you're talking 50k outbound connections to remote MX servers. Also, and I hate saying this, but the advanced features, flexibility, and functionality that make Exim so great will also hinder you. You don't need a full blown MTA here. Don't hate me, but I REALLY recommend Qmail in this application. It's fast, lightweight, and for this application ... simple. Might as well go with djbdns on the local machines for DNS caching, too. I don't typically recommend D. J. Bernstein software, but I think it's the right choice here. My 2 cents. -- ## List details at http://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
