My understanding of what the Russians want to do is a bit different. I thought they wanted to route the entire Russian Internet through a server that is under government control so that they could more easily spy on anyone they want to and also cut off access at any time they want to. However, I very much doubt they don't already have the technical means to do much of this already, just less efficiently. Until and unless you use an end-to-end encrypted service and only communicate to others using encryption I suspect your emails could be intercepted and read in almost any country, whatever the public laws might state. On the other hand, there are numerous "privacy-focused" European email providers to choose from, and just recently there was a thread on here mentioning Soverin based in the Netherlands, which looks interesting. Here's an article on what they are doing.
https://www.wired.com/story/russia-i...-what-happens/