Start with end user productivity: As you look to reduce costs, you will want to ensure that user productivity and functionality is not negatively impacted. Smartmax and qmail don't support the full range of functionality available in Outlook. If your organization uses calendaring and scheduling, public folders and the advanced features in Outlook, a move to one of these products will mean significant losses in functionality. There are Linux e-mail alternatives that support the full set of functionality that comes with Outlook, however. There are two ways to determine this: 1) whether the Linux mail system supports MAPI in native mode and 2) If the Linux mail system supports Outlook running in Workgroup mode.
You can reduce user-related costs by eliminating system downtime. There are many Linux e-mail alternatives that provide superior reliability and less downtime.
Finally, do not forget to account for the cost of e-mail ecosystem components that improve system security and user productivity. These items include anti-virus and anti-spam software, directory and identity management software and system monitoring tools. A Linux mail system that supports a broad variety of open source tools such as Spam Assassin, ClamAV, Nagios, LVM and OpenLDAP can reduce the cost of e-mail by as much as 30% to 70%.
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