52 CHAPTER 3: U SING M ESSAGING FEATURES■ IMAP — The Internet Message Access Protocol is also used toretrieve e-mail messages from a mail server but includes somefeatures not supported by POP3.■ Associate a mailbox with the e-mail account.■ Identify a third party server as your outgoing SMTP (Simple MailTransfer Protocol) e-mail server.The remaining sections in this chapter provide general information onconfiguring an e-mail account and how to work with e-mail messagesforwarded from an IP Messaging mailbox to an associated e-mailaccount.POP3 E-MailApplicationsFollow these general steps to create an e-mail account in an applicationthat uses POP3 (ask your administrator for the specific informationrequired in your IP Messaging environment).■ Create an account in your e-mail application that points to an IPMessaging mailbox.■ Set the incoming mail server (POP3) to be the IP Messaging DNSdomain name.■ Configure IP Messaging as your outgoing server (SMTP), or configurea third party server.Once a message is downloaded to the e-mail account, it is markedreviewed in the IP Messaging mailbox. If you do not configure the e-mailaccount with a leave-message-on-server option (in Outlook Express, thisis the Leave copy of message on server option), the message is alsomarked deleted and removed from the IP Messaging mailbox after theconfigured retention time.Sending MessagesYour IP Messaging administrator must identify a third-party SMTP serverto send, forward, or reply to e-mail messages. You can then configure thisserver in your e-mail application as the SMTP server.Optionally, your administrator can identify IP Messaging as the SMTPserver. However, this configuration limits the exchange of e-mailmessages to IP Messaging subscribers; you cannot send or forwardmessages to external addresses, or reply to e-mail messages from externaladdresses.