How to associate iPhone application with _every_ file type?

Question

There is iPhone app \"Another Mail Client\" that should be able to open any file to send it as attachment. So, I want to associate this application with any file with any extens

Answer 1

An idea for investigation...

If the installation of another app "fixes" the problem then try inspecting the other apps Info.plist file to see if it is registering or exporting any interesting UTIs or similar settings.

It sounds like your app might only be doing half the job and the other app is completing the missing setup.

You can inspect the contents of an apps ipa file from iTunes by copying it, renaming ipa to zip extracting the contents and then Show Package Contents on the app inside.