I have been using
Aqua Mail Pro on my Android smartphone for some time now, and am quite satisfied with the configuration options available.
I may consider using the FastMail app, but I have questions about the available access to my FastMail account - does the app give full access to the account, in not only can it send e-mails, but it can also do everything that one could configure on the web version?
For example: create/delete users, aliases, calendars, contacts, etc.
Personally, I would not want to use the app if it did - I would just want it to receive/send e-mails - nothing else.
Some people may want to be able to access all options on an app on their smartphone, but I am most certainly not one of them.
Is the app configurable to disable access to the examples above?