The difference between email and website addresses
I know people who have tried to send an email to a website address: www.example.com, or tried to visit the website of an email address: fred@example.com. The problem is not always evident to new computer users. So how can you tell an email address from a website address? The simplest way to tell the difference is an email address always contains the ‘at sign’ (@), and a website address never does.
Email addresses should be written in lower case eg. fredsmith@example.com. Sometimes you will see an email address written in mixed case (FredSmith@example.com) to improve readability.