Hi. I would like to know how to configure my sistem to send e-mails. I can send them to my users, but I tried to send an e-mail to ronaldace@coolmail.net (my real address) nd I got a message saying: "Error 550: Message relaying to <ronaldace@coolmail.net> prohibited by administrator>". I got the error when sending the e-mail as an user and as root using Tk-rat. Thanks for your help. Ronald