Like Post Office Protocol 3 (POP3), the IMAP4 protocol uses port 25 Simple Mail Transfer Protocol (SMTP) to send messages, but an IMAP4 server uses port 143 to listen for messages.
Unlike POP3, IMAP4 allows you to store your messages by default on the
server, instead of downloading them locally.
Use one of the following methods to configure Outlook as an IMAP4 client:
Click Microsoft Exchange, POP3, IMAP, or HTTP, and then click Next.
5.
In the Auto Account Setup dialog box, click to select the Manually configure server settings or additional server types check box, and then click Next.
6.
Click Internet E-Mail, and then click Next.
7.
In the Server Information section, select IMAP for Account Type.
8.
In the Your Name box, enter your name exactly as you want it to appear to recipients.
9.
In the E-mail Address box, type your e-mail address.
10.
In the User Name box, type your account name.
11.
In the Password box, type your password.
12.
In the Incoming mail server box, type the name of your IMAP4 server.
13.
In the Outgoing mail server (SMTP) box, type the name of your SMTP server.
Note IMAP4 is a retrieval protocol. You must have SMTP to send your messages.
14.
Click Next after you have completed entering this configuration information, and then click Finish.
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