If you have set up multiple e-mail accounts (e-mail account: The server name, user name, password, and e-mail address used by Outlook to connect to an e-mail service. You create the e-mail account in Outlook by using information provided by your administrator or Internet service provider (ISP).) in Microsoft Outlook, you can specify which account to use when sending a message.
- In the message, click Accounts.
- Click the account you want to use.
- Sending messages from your ISP account may require you to be connected to that provider in order to receive permission to use the e-mail server. Contact your network administrator or ISP for more information.