Google has designed free Gmail email services with several features including GTalk, Docs, Calendar etc. these services can be yours just by signing in. for starting with Gmail Inbox, you are needed to follow these provided instructions. Make sure you have entered www.Gmail.com in the address bar to reach the sign in page of Gmail. Now, type the username and password in the given space. These details should match with the details submitted at the time of registration. After this, hit the sign in button. Now, within a few sends you will be taken to the inbox of Gmail. Gmail inbox has capacity of more than 10+GB storage and spam filtration.