I don't think so. Yes, there are open source components in there. But there's also a huge amount of their own code, and can iirc present as a whole MS Exchange server to an Outlook client. There's also a user-customizable web frontend with groupware-like features. The whole package is a lot different than just combining a few packages into a bare-bones email service.
I don't think so. Yes, there are open source components in there. But there's also a huge amount of their own code, and can iirc present as a whole MS Exchange server to an Outlook client. There's also a user-customizable web frontend with groupware-like features. The whole package is a lot different than just combining a few packages into a bare-bones email service.