Secure email means nothing if you access it thru unsecured internet, ie you need a VPN... A lot of people like securenym but I feel like those accounts get hacked a lot, at least on the other side of things than you and I... I used countermail for a good while and it works just fine, but not sure how secure it really is.
I've often wondered if a dummy gmail isn't maybe the safest. Lets face it, if you have an account at a secure email that's a red flag to anyone looking at you in the first place. Might it not be better to "blend in" with billions of other email addys?
I also think the manner in which we order from most sponsors is bonkers but that's a diff topic...