[dillondoyle]

The webapp can send your data wherever once it has the data, chrome won't log http requests if they were made server to server etc

[gsich]

A native application can do that too.

[methyl]

Isn't it the case for any app?

[Qwertie]

The logic is a native app can make a direct IMAP connection to the mail server and you can check it is doing so where as a web app has to send the login details to a server which does IMAP for the client and you can not see this last part.