Mailbox only works with Gmail and iCloud Mail. Gmail supports OAuth2.0 [0] while iCloud does not [1,2]. On the other hand, Outlook supports OAuth2.0 [3] and is not supported by Mailbox.
Thus, even if the choice of the authors of Mailbox gave them some edge, it is surely not the one you described.
Comments
This doesn't make sense.
Mailbox only works with Gmail and iCloud Mail. Gmail supports OAuth2.0 [0] while iCloud does not [1,2]. On the other hand, Outlook supports OAuth2.0 [3] and is not supported by Mailbox.
Thus, even if the choice of the authors of Mailbox gave them some edge, it is surely not the one you described.
[0] https://developers.google.com/gmail/xoauth2_protocol [1] http://stackoverflow.com/questions/18649352/is-there-an-iclo... [2] http://www.iphonehacks.com/2014/01/apps-ask-icloud-password-... [3] http://msdn.microsoft.com/en-us/library/dn440163