What's the #nostr folk prefer reliable encrypted email service? Do you use proton mail?
Discussion
Or tutanota. Or you can use your own gpg keys. I reccommend that because that works always and is not bussiness dependend.
Diyana, take a look at the nostr:npub14slk4lshtylkrqg9z0dvng09gn58h88frvnax7uga3v0h25szj4qzjt5d6 account. They recently posted pros and cons of different email services.