Radiant Mailer Behavior

 Hi,

i am pretty much excited by using Radiant. I am a bit confused by the Mailer behavior. I am trying to implement it but it gives me errors. Can someone talk about this from his experience? 

Also config part needs to be defined the same way as a page part, right? Is there a need of defining smtp?

Thanks in advance.

Regards,

Rizwan Reza