Is that only affecting things from neurotalk or all of your emails?

Have you updated or had any browser updates lately?
Or maybe a setting got changed on your browser?

I would try a different browser to see if that is having something to do with it. FireFox, Flock, Opera etc.- all free.

I'm thinking if it was the site here many more would be having problems.

Do you use webmail or a pop mail program, like -Outlook, Outlook express or Thunderbird? If a pop mail program that could be where the problem came about also.

If this just started happening try to recall any changes that were made on your computer at the same time frame??