Iam writting a python script that converts .msg and .eml files to PDF.

I can simply create a .eml file by saving the e-mail from Outlook to any directory in my PC

But I’am unable to do the same with .msg. I have even sent another .msgas an attachment but somehow my system converted it to .eml.

I’am using a Macbook M1. how can I creae a .msg file ?