Hi Rickyr,
You can adjust your settings for the emails you'd like to receive in your Profile & Settings tab, which you can find by clicking the down arrow up at the top next to your user name. Scroll down to the middle of the page and there is a section for email settings. Just select the emails you'd like to opt-out of/opt in to.
I think if you are already signed in, you shouldn't have to do it again each time. Unless there is something that is clearing your cache on your browser. Let me know if that helps, or send a PM to NAFC if you need more assistance.
Thanks,
NAFC