How to change Send Mail from gmail

1. Go to gmail - Setting - Accounts and Import
2. go to send mail as - add another email address yow own
3.  name - your name
     email address - helpdesk@any.com
4. click - next
5. smtp server - change smtp.gmail.com
   username - xxx@gmail.com (original mail id)
   password - xxxxx
6. click next
7. then go to mail and copy the code and paste over there and finish the task.

8. now go and check mail