Not sure about your question...
Not a hardware/server issue per se.
You are looking for software that will run on a recipient system (server) to parse the incoming email to that specified email address - correct?
Did you write the program that creates and sends the excel csv files?
Take a look at the following links:
https://mailparser.io/blog/read-parse-process-email-file-attachments/
https://parseur.com/how-to/extract-text-from-email-attachments-documents/
Should help you get started.