Lots of people nowadays use Gmail as it is probably the best free email service on the web. Chances are , you also have an account and you use it frequently.

The problem is, your office firewall may have been configured by your admistrator to prevent you from accessing it. One way to circumvent around the restriction is to use a different web address. Instead of using the usual htt://mail.google.com, use www.gmail.com, http://googlemail.com or https://m.gmail.com.