We have a Triggered Automation email setup through Automation Studio that's not sending to everyone in the Data Extension (DE).
The trigger is the new csv file dropped into the Enhanced ftp. The first step after the trigger Imports the data from that csv file into a DE. The second step sends the email to the subscribers in the DE. All of these steps work, but not all emails are being sent to the full DE list. In our tests only emails in the DE that are on our All_Subscribers list are sent the email, not the new subscribers.
Any ideas on why emails don't get sent to the new subscribers/emails in the DE? A ticket has been opened with Salesforce and we're waiting for their feedback too.