Comment Re:Split up the tasks (Score 2, Interesting) 1216
Having dealt with sendmail at scale, I would definitely say no. And if you think that it is the most configurable, sounds like there are some MTAs you still need to check out. I recommend Exim.
I agree that you want to split things up-- make farms of large numbers of servers to make horizontal scaling easy. Store your user info in LDAP (OpenLDAP works very well, with very good data replication in 2.3.x). Most common server software will support LDAP and it scales very well.
You need "layer-4 switching" to load balance across machines, and automatically disable systems/services that are down. You need something that will cluster. I recommend Foundry ServerIron switches. F5 BigIP is another common alternative.
I agree that you want to split things up-- make farms of large numbers of servers to make horizontal scaling easy. Store your user info in LDAP (OpenLDAP works very well, with very good data replication in 2.3.x). Most common server software will support LDAP and it scales very well.
You need "layer-4 switching" to load balance across machines, and automatically disable systems/services that are down. You need something that will cluster. I recommend Foundry ServerIron switches. F5 BigIP is another common alternative.
