Remove @zoho address from "From" dropdown?

Remove @zoho address from "From" dropdown?

Is it possible to remove the @zoho address from the "from" drop down in the mail app? I have my " myname@domain.us" address set as my primary, so its automatically selected when I go into the app, but it'd be nice if I could delete it so I only have my primary one set-after all, its the whole point of using email hosting, and not going with something like Gmail.

Also, is it possible to change the user info above the "compose" button, so that it reflects the primary email ( myname@domain.us?)

Thanks!