An Introduction to the Windows 2003 POP3 Service

What is POP3?

POP3 is a client-server protocol in which email is received and held by a mail server. Messages are downloaded to a local computer all at once, thereby making offline reading easier. You can specify whether to keep copies of the messages on the server. The default port number for POP3 is 110.

What is the POP3 Service?

The POP3 (Post Office Protocol version 3) service is an email service that retrieves email messages. Administrators can use the POP3 service to store and manage email accounts on the mail server. Although the Microsoft Exchange family provides more flexibility to a mail server, the user experience on an email client (such as Outlook Express) - when sending or receiving email - is the same. The end user will not notice the difference when downloading their personal email from the server.

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