Did you see the comment by “FT” in our recent inquiry about ProtonMail? FT recommended MailFence. We tried it and we LOVE it! It’s secure, free, and they even have other tools and resources built in. Belgian privacy, no ads, no spam, no trackers – and no back door. Check it out – and we’d love to hear your input on it, as a ProtonMail alternative: https://mailfence.com/.