Please recommend other interesting email services by your experience.
I have switched from Google's Gmail to ProtonMail and kMail. I really like both, kMail (by Infomaniak) have very similar app interface to Gmail so you will get used to it very fast and also have big storage for free and very good offers for paid plans ๐๐ผ
I haven't tried that one. I had a few choices alongside Soverin. Proton I ruled out because of their weird support of the US government, and apart from that I think Soverin was the only one with unlimited aliases