If your Transactor Desktop version is earlier than 7.08 you must also add angled brackets around the email addresses.
Click the Email icon on the toolbar of the preview window. Enter single or multiple email addresses in the To, CC and/or BCC boxes.
Send to a Customer's Email List
In the Customer Edit screen, enter multiple email addresses in the EMAIL LIST box (this is below Primary Email). Follow the rules for formatting as described above.
Now, wherever you are choosing a SEND TO, select 'Customer's Email List'.
Note, the customer's Primary Email box will only accept one email address, so you must use the Email List if you need to specify multiple addresses.
Note also that if you wish to send a document to the primary email, as well as the email list, you will either need to add the primary email address to the email list, or send the document twice choosing the appropriate Send To each time.