if the support using the PHP mail() function, you should be fine using universal email.
can you send a copy of your page that you have applied universal email to as well as the WA_UniversalEmail folder so I can examine ho you have it configured.
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.