gingerman

I don’t have an exact answer for you but went through this a few years ago with the help of a thread on DSLReports

There’s a lot of info there and can be a bit tough to follow but it should get you what you need.

I’m on Android. If you search for this issue, they’ve been talking about adding conversation view for years. It’s currently a non issue for me, just pointing it out for anyone considering the switch

I just made the switch to proton in the last week and so far I’m happy with it, even decided to pay for a year of service. The one feature I’m surprised to see missing from the android app is conversation view. The web app has it, but mobile doesn’t. My personal email is very minimal so I don’t really care, but for heavy users this might be an issue.