Tuta
Notice: Use of IMAP and SMTP, open standards for email clients, is not possible with Tuta. This is not acceptable behavior for an email provider and use of Tuta is strongly recommended against for this reason. Tuta's stated reasons for not supporting these protocols are lies and you would be well served by closing your account there.
Well that's a strong opinion. And yes, 100%, IMAP is not a end to end encrypted protocol so how can they offer it when the server can't read the data?