[goingindi]

Regarding migadu, which I am now looking at, what verification have you who’ve selected it done for this statement “ Your emails are your own business. We have no interest in them. We do not access1, analyse2, scan or share any user data.” from their site?

[estaseuropano]

As emails are not encrypted in transit or storage - none. I know that their business is email, not ads, and that I'm the customer, not the product.

If you have confidential emails best to encrypt them before sending, but that is true for anynhosted service.