Hello,
I see that you would like to automate a process of placing an outbound calls and play a pre-recorded message to your existing customers if the from email match a record in your database, the telephone record of the database is returned to another outbound API to place the call using the received number from the database, if the call is connected/voicemail, a pre-recorded message is played.
If this is something you are thinking to create, you're thinking right! If you can think it, I can create it