Below is the workflow you are looking for. I used to extract PDF files from email and Saving extension is dat file, which you can change. You can also change the settings in Email Reader (Labs), what kind of email you want to read.
Thank you so much for the workflow and the explanation!
This is very helpful.
I will modify the saving extension to .xlsx and test the Email Reader (Labs) configuration to extract Excel attachments directly.
If convenient, could you please share the workflow file you mentioned?
It would help me verify the settings more quickly.