How does one use port 25?  Please be explicit.  I simple am unacquainted with
its use and wish to understand it.  Please understand I have no inappropriate
use in mind...I'm an academic type and want to understand.  Thanks.
 
Jeffrey Tosk, Ph.D.
Assistant Research Professor of Psychiatry, Neurology and Physiology,
Loma Linda University
School of Medicine
UMBJTO@LLUVM