Hi, sorry, but I don't exactly understand the question. Could you please explain in more detail what you would like to do?
I think it is the same question I am facing:
I have an OX Apps account with one or more e-mail aliases (in my case by mailbox.org).
I would like to set one of these aliases as the standard oder primary from:-address within the OX Mail App (on Android that is).
Currently I do not see any way how this could be achieved but have to chage to th desired alias manually every time
Customer support service by UserEcho