I have setup the following file tcp.smtp.cdb which after I tcprules it I then run the command : tcpserver -x /etc/tcp.smtp.cdb -v -u 112 -g 104 0 smtp /var/qmail/bin/qmail-smtpd & tcp.smtp contains the following : 24.26.:allow,RELAYCLIENT="" 212.159.:allow,RELAYCLIENT="" 216.:allow,RELAYCLIENT="" 206.154.:allow,RELAYCLIENT="" 195.8.:allow,RELAYCLIENT="" :allow The only problem is, it does not work, I have the exact same configuration on another mailserver, however, I did not install that one, which might explain why this one does not work... ;-) My IP always begins with 212.159. but even I could relay an email... I just get the error : <[EMAIL PROTECTED]>: 195.224.150.194 does not like recipient. Remote host said: 550 Relaying is prohibited Giving up on 195.224.150.194. I also have run the following from the command line manually : exec env - PATH="/var/qmail/bin:$PATH" qmail-start ./Maildir splogger qmail & tcpserver 0 pop3 /var/qmail/bin/qmail-popup dwshop2.dedic.web.xara.net \ /bin/checkpassword /var/qmail/bin/qmail-pop3d Maildir & Any ideas? Regards, Kevin Smith