Linked by Alex Chejlyk on Mon 18th Jul 2005 17:09 UTC
Internet & Networking Microsoft dropped support for Exchange 5.5 on December 31st, 2004. Exchange 5.5 users can upgrade to Exchange Server 2003, continue to run 5.5 with all accompanied security risks, or switch over to another mail/groupware system.In this article I propose a fourth option that is really options two (run Exchange) and three (run another mail system) combined.
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RE[2]: VMware
by Anonymous on Mon 18th Jul 2005 23:05 UTC in reply to "RE: VMware"
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Regarding ESX: I've run an Exchange 5.5 server under ESX server in production for several years. Similar to the setup above, all mail is proxied by a linux firewall (which also performs virus checking and spam filtering) before reaching the exchange server. This IS a workable solution, even if it isn't optimal.

The real problem for Exchange replacements is authentication: none (as far as I know) integrate seamlessly into an NT domain for user authentication. Many users still on exchange 5.5 have also eschewed AD.

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