@Gabz about 6 months ago I was doing the same search, I ended up with FastMail. Fastmail cares about their service, security, and email protocols all together. As for "secured" I suppose that depends on your meaning of secured. I know they are a secure email company but ProtonMail provides a higher level of security just because of the features they provide to the users. I'd say it's worth signing up and using the trail account they provide you. Good luck!