Forgot password link with google server in sap portal 7.0

Hi Experts,

We have a requirement that Enabling the forgot password link on portal logon page.

We have to do with Google server as we don't have SMTP.

Please provide the steps which needs to be done with google server, and where we will configure the google server details.

Portal version: 7.01

Data Source: ABAP.

Your responds will be appreciated.

Regards,

Vamshi Krishna