Revert 6428245..62ce11d

This rolls back to commit 6428245782d3c7c577bbe47ee2aa9148fdbddd44.
Revert 62ce11d..e16de49

This rolls back to commit 62ce11d123716a14e0ed3d2e516e1813c76ab524.
change default mail address, error alert, server info for xmpp