...I am now receiving are completely messed up with lots of XXYSSGGEESCGD and text like that.
I'm contacting you via your support request, to have some samples of these notifications and then we will investigate the problem.
how can I grade my questions? Can it only be done from the links in the e-mails I receive? If so, what has happened to my e-mails and what can I do about this?
You can access all your past questions from your profile.
Click on the tab KudoZ, visible on top of the page, then go to the page of the Asked questions (there are two lists: Asked and Answered). On this page, you can see the list of ALL questions you asked, or select only the OPEN questions, i.e. the questions not yet graded.