Synopsis: Internal User > Load Balancer > MMP/Communications Express Proxy Server 1 or 2 > Message Store 1 or 2
Mail is retrieved by using either POP, HTTP, or IMAP. The user connection is received by the load balancer and forwarded to one of the MMP or Communications Express servers. The user then sends the login request to the access machine it is connected to. The access layer machine validates the login request and password, then sends the request over the same protocol designated by the user connection to the appropriate Message Store (1 or 2). The access layer machine then proxies for the rest of the connection between the client and servers.