Both of these services provide similar functions within the cluster and from a configuration standpoint, they are identical. They both use the same authentication method, internal or LDAP, and in the second situation, they use the same connector. In a similar way, the same user map is used for the routing section of these services.

The only notable difference between configurations of these services is the failover address and port used. The failover address is used in case a match is not found in the user map. As these services use different ports and different protocols, an IP-port pair can be specified as failover for each individual service.


Both IMAP and POP3 proxy services can run on the same system as the IMAP and POP3 services, forwarding requests to the same system or another system when required. This helps with the design of single tier clusters that have neither stand-alone front-end nodes, nor load balancers.

For more details on this topic please see IMAP Proxy Service and POP3 Proxy Service.