[jgao]

I used the java program in preauth.txt, compiled and ran it to generate preAuth, and manually passed it with other parameters to the /service/preauth?......, it works. This mechanism is not bad.

I loaded your preauth.jsp into webapps/zimbra, but can't get it compiled, even after I tried quite a few different things.

Could you please try it and post a working version?

Thanks.