To create a segment of Accepted authors, do the following:
Select a usertype first i.e. Authors from under “Usertype” section.
From under “Columns” section, select User ID, First Name, Last Name, Email
From under “Fixed fields from Abstract Management :” section, select Abstract ID, Title
From under “Filters” section, Apply filter for Abstract Status (to Accepted) and Author role if you only want this mail to be sent to the Primary author of the abstract or both Primary and Presenting authors
If you only want to include abstracts from a specific submission type, Select the Submission Type filter as well and select the desired submission type (comes up when you select Is Any Of).