I'm rather new to the Zimbra platform, and I must say that Zimbra's webclient is the best I've found on the internet. However, I already have an email sever which I don't plan on retiring. So, is it possible to only use Zimbra's webclient, and use it with my own servers? If so, how do I go about doing this(do I need to copy files to my webservers and edit them?)

Thanks for your assistance!