Switch between sending emails from different accounts in Outlook by following the instructions below.

1. Open Outlook and then open a blank email.
2. Select the Options tab. The Options tab displays.

   
   

3. Select the From button located in the Show Fields section of the toolbar. The drop-down menu displays.

   
   

4. The drop-down menu displays two options: your own email address and a Other E-mail Address option. Select the Other E-mail Address option. The Send from Other E-mail Address screen displays.

   
   

5. The Send from Other E-mail Address screen provides the ability to select the email address from which you want this email to be sent.  Add the alternate email address and click OK.