99.9999% of people won't care about this. But I was annoyed I couldn't find exactly what I was looking for when I needed this, and it was deceptively more difficult to figure out than I expected.
But on a PC if you have a MSG file, you can just open it and download as a PDF. However, if you are on a Mac, this isn't an option as MSG is propritary to Microsoft.
So I made a little github repo that allows you to bulk process as many MSG files as you need.
Ultra simple, nothing special, but a niche tool that I personally struggled to find a free solution to. This is assuming you know minimally how to run python code. If you don't, ChatGPT is a great resource, just give it the url and ask what you need to do. Although, I can't imagine too many people in a non-tech space would need this haha
https://github.com/hyrumsdolan/MSG_to_PDF
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This was just the most relevant sub that seemed to have more relaxed rules. I make no money on this, just know I would have been happy to stumble on this while I was searching and hoping this helps someone in the future.