<DIV> <BLOCKQUOTE class=replbq style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid"> Ok, You'r right. The specific problems are: 1. I have not been able to understan how to setup the DNS. For example, my Domain Name is university.edu.co, my host name is micity so my whole the Domain name for my Internet Server would be, mycity.university.edu.co , right? How do I configure that? 2. I'm using Postfix as my MTA, I'm able to send mail's to my yahoo account. but I get this address in th FROM line in Yahoo: FROM: <A href="mailto:aganeml@localhost.localdomain">aganeml@localhost.localdomain</A> I'm using Webmin and I sended the eMail from there, In the FROM line in Webmin, it has <A href="mailto:aganeml@www.university.edu.co">aganeml@www.university.edu.co</A>. I tried deleting manualy the www in that address and I got ir right in my Yahoo messege (<A href="mailto:aganeml@univeristy.edu.co">aganeml@univeristy.edu.co</A>). In the /etc/host I have 127.0.0.1 localhost.localdomain www.cecar.edu.co localhost www What I'm I doing wrong? I'm sorry if my questions are to simple, but I《 just getting started, so one again thanks for your patience. Abraham </BLOCKQUOTE></DIV> <hr size=1>Do you Yahoo!? <a href="http://us.rd.yahoo.com/mail_us/taglines/50x/*http://promotions.yahoo.com/new_mail/static/efficiency.html">Yahoo! Mail</a> - 50x more storage than other providers!