How to pass the authentication information to SMTP

System

I used the Template-Based Email Notification (iw_solution_email.ipl) provided with TeasSite 5.5.2 in workflow.

But I got a error message: 554 5.1.0 Sender Denied

(p.s. Please see attached file at line 452)

Because the SMTP server need authentication.

Does anyone know how to pass the authentication information to SMTP server?