the contact form solution pack cannot be used with SMTP servers that require authentication.
it uses the php mail() function to connect to the smtp server.
the php mail() function does not offer a way to pass authentication.
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.