Kids, there are MULTIPLE SERVERS in-play.
Server #1: CLINTONEMAIL.COM - HRC's private server that was in her house and running email for this domain. If I remember correctly, it was a Windows 2008 R2 server that was un-patched and not firewalled running Exchange. Easily hacked.
Server(s) #2: DNC servers. Seth Rich was the IT guy who took loads of data using USB thumb drives and gave to JA. The DNC servers were likely NOT hacked by the Russians - we know, at least, that the data was transferred by USB and not an Internet connection.
There may be other servers in-play.