"Snubby" has been replaced, its now something based on Postfix.

I can't count the number of SMTP servers in each server pool like I could with the previous SMTP implementation, but it is worth noting that the number of HTTP servers in each redirection pool has dropped. There were 30 machines in each of four clusters at different two locations, for what looks like a total of 120 servers in the US. Now the clusters are down to 20 machines in each, so 80 total US. Its safe to assume those machines have been transfered to the SMTP pool in this change. That would be at least 20 SMTP servers on each coast.