Hi, people.
I want to thank every one in the list, specially to
Barry Brimer and Bill Campbell for their good advices.
I will install CENTOS 5.1 and will try their recommendations.
I must state that I would like to use Postfix in my box and
I think it will fulfill the needed requisites (if I learn
first what are "smtpd_restrictions_classes" and the other
tips I received .. J ).
Thanks to all, again.
M. Leon