Microsoft Outlook can handle several email accounts in addition to your PTS account. For example, you can add your gmail, Yahoo, or any other account to Outlook. These added accounts are still accessible in the usual way you access them.
To add an additional email account to Outlook on Mac:
Click Tools > Accounts
The following screen pops up. Click the down arrow in the lower left corner, then click E-mail....
The following screen will pop up. Enter the email address and password of the account you want to add.
Be sure the check box next to "Configure automatically" is checked as Outlook is capable of setting the proper configurations for almost all popular email services. Click Add Account.
The following screen will appear. These are the standard settings for gmail (If you are adding an account other than gmail, these settings will be different). You don't need to change anything, but you might want to change "Full name:" as Outlook will set the default to "admin". When finished, simply close this screen.
All your folders from the new account show in the folder tree, and your new inbox will usually be under your PTS inbox.
Something to be aware of:
When you create a new email, be sure to send from the email account you intend.