But having to switch between email accounts can be a pain.
Now move to the Accounts and Import section.
In the Send mail as section, tap the Add another email address you own link.
Enter the email address you would like to be able to send from and then click Next Step.
check that that you have the Send through Gmail option selected and then click Next Step.
Gmail can now be used as your sole email tool no matter how many email addresses you have.