PEAR Mail_Queue without SMTP

I’m trying to use the Mail_Queue package from PEAR, but in all the tutorials and documentations, it mentions that you need to define your SMTP that Mail_Queue will be using…I don’t want to use SMTP, and in conjunction with PEAR Mail, I want to have it use the simple Mail function.

Is this possible?
I am trying it, but no results…any guidance or thoughts?

Thanks.