Please read http://blogs.adobe.com/security/2011/10/just-released-adobe-reader-10-1-for-ios-and-android.html, and the FAQ referenced at the bottom. Please make sure you are running the correct minimum server version, have SSL correctly configured, and that the policy associated with the document you...

Correct, you can't insert a user's email address into the watermark as a variable.You can show the user's full name, or his login. Have you happened to map either of those fields to the full email address in User Manager? That would be a workaround I guess.

Acrobat/Reader 9 were the first version to incorporate AES-256 code, so if you want to remain backwards compatible with Reader 7 or 8 you need to continue to use AES-128. I believe this is documented in the help for the section that describes how policy edit works.Jonathan

This is not supported on the Mac.Jonathan