Occasionally we do get issues with email, and you need to find out where the problem is occurring. It is not necessarily at your end, it may be at the senders end.
Also if you suspect that there may be something not quite right with email please come back here and check. If I am aware of anything, or am working on it, then my status will be reported on this page.
I have created a troubleshooting guide in PPT that you can find on the News page to step you through what you need to do.
The page Troubleshooting Email and associated downloads can be found here.