Hi I am looking at running Zimbra to replace a MDAEMON windows server. Currently the server sits on our intranet with an internal mail domain. All local clients interact with it using local addresses. When a local client sends external mail, the from domain is transformed to our internet based mail domain and therfore resolves correctly when challenged by external mail servers. The Mdaemon server logs onto our muliple internet mail domains using multi pop and downloads all mail from the inertnet mail domains, it then distributes that mail to the individual user mailboxes on the local machine based on the address sent to.

The local MDAEMON server also has non standard ports configured through our firewall to allow secure IMAP connections directly with the server from mobile workers. They authenticate using their local addresses.

How can I achieve this type of setup using Zimbra?