Configure smtp through the authentication smtp server on OsCommerce

My Oscommerce had working mail function all the time. Suddenly my internet provider changed their SMTP server requiring authentication and mail function does not work anymore. Before in my [login to view URL] I configured only this: SMTP = smtp_port = And everything worked. Now I am trying with this but without success. SMTP = smtp_port = auth_username = auth_password = Please try to configure it properly but preferable with possibility to add this smtp information on configuration page not going on [login to view URL] file. And preferable with google smtp server. There is one nice add-ons here . [login to view URL] it makes mail configuration possible to change on admin page but I fail to make it work anyway.