Mail Box Full?

Email accounts are limited in size so you need to delete emails frequently from:

1. your “inbox”,
2. your “junk email” folder and
3. your “sent" folder and then
4. your "deleted items" folder

You can delete all items in the Deleted Items folder by using the right mouse-click and choosing Empty Deleted Items Folder.

If you receive a large attachment from a professor consider saving the attachment to disk and deleting the email.