If you have Outlook 2013, there's no reason to log in to a Web browser every time you want to check your Yahoo Mail messages. Adding a Yahoo account, including RocketMail and YMail email addresses, requires just a bit of configuration.
There are two ways to set up Outlook 2013 to access your Yahoo mail account: POP and IMAP. Set up a POP account if you want copies of messages to appear independently in Outlook and the Web browser. With POP, for example, when you read an email in Outlook, it will remain unread when you log in to Yahoo using a Web browser. Set up an IMAP account in Outlook if you want the changes made in Outlook to be reflected on the server when you log in with a Web browser.
Launch Outlook 2013. Click the "File" menu and then click the "Add Account" button that appears on the Account Information screen.
Click the "Manual Setup or Additional Server Types" option. This will provide you with the advanced settings you need to specify Yahoo's email servers and port settings.
Select the "POP or IMAP" option. Except for the incoming server and port numbers, the process for setting up either POP or IMAP is the same.
Enter your name and email address in the User Information section. In the Logon Information section, enter your full email address and your password.
To set up a POP account, select "POP3" and type "pop.mail.yahoo.com" in the Incoming Mail Server field.
To set up an IMAP account, select "IMAP" and type "imap.mail.yahoo.com" in the Incoming Mail Server field instead.
Type "smtp.mail.yahoo.com" in the Outgoing Mail Server field and then click the "More Settings" button.
Click the "Outgoing Server" tab in the Internet Email Settings window. Click the check box to specify that the outgoing mail server requires authentication. Yahoo Mail's outgoing mail server uses the same settings as the incoming mail server, so leave the default settings as is.
Click the "Advanced" tab. For a POP account use "995" as the Incoming Server port number. For an IMAP account, use "993."
Click the first check box to specify that the incoming server uses an encrypted SSL connection.
Type the port number "465" in the Outgoing Server (SMTP) field. Select "SSL" as the encrypted connection type.
Select the delivery options you want to use for the account and click "OK."
Click the "Next" button and give Outlook a few seconds to connect to your Yahoo Mail account. If the connection fails, review the information you entered for any typos and try again. Clicking the "Errors" tab in the Test Account Settings window can often show you what the problem is. When the connection is successful, close the window.
Go to Outlook's Mail view and click your Yahoo account in the left menu to expand its folders. When you want to send an email from your Yahoo account, click the "From" button when composing the message.