There is another option you could try, which has worked for a couple of people who had similar problems in not receiving notifications. You could either change your email address on the board altogether and hopefully then be able to collect your notifications from that address (I know it may not be ideal but it's an option).
Clearly though many people like to conduct their daily emails from one main email address so the other alternative is that you set up another email address just purely for the board and then setyour email settings in that new address to "forward" emails from the board to your main email address. I know of a couple of people who have done that and they have then received the "forwarded" email notifications without any problem, so it may be worth consideration.
If you did want to give that a go and change your email address either pm me first or write to email@example.com, as changing the address yourself may deactivate your account.