- Click on File, Account settings in Outlook 2010 and 2013 or Tools, Account settings in Outlook 2007. See below for the menu path in older versions of Outlook
- Select the account and click Change to open the account settings dialog (or double click on the account).
- Click More Settings.
- On the Outgoing server tab, select the authentication method used by your SMTP server. Most will use the same as the Incoming server. If you use a server that is associated with a different account, enter the correct username and password on this tab.
- Change the port numbers and encryption method on the Advanced tab as needed.
Note: The screenshot above is the More Settings dialog for an IMAP account in Outlook 2013. The options available vary for POP3 accounts and in older versions of Outlook.