Problems setting up startmail client on ipad
I had previously logged into the Startmail web client on the iPad and iOS stored the password automatically without my being aware of it.  One of the security features of Startmail is that it assigns a new password to any device that accesses it using IMAP.  When I set up the IMAP account on the iPad I entered the new, device specific password but iOS over-rode it with the stored, web-client value.  Since it was typing in a password field I couldn't see it.  When I found the stored password and deleted it I was able to set up the IMAP account following Startmail's instructions.