Comparing the POP3 Service in Exchange Server 2003 and Windows Server 2003

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The POP3 service is a standard messaging protocol that is supported in Microsoft® Windows Server™ 2003 and Exchange Server 2003. Although the POP3 service offers the same functionality to any POP3 client, the administration and architecture of POP3 service in Windows Server and Exchange Server are different. Exchange Server also offers additional functionality in messaging and collaboration. All these aspects play a role in the choice of a messaging system.

These topics outline the difference in the POP3 service in each product and provides guidance for users trying to determine which POP3 service is appropriate for their environment.