[gentoo-server] SMTP Authentication

[Suranga Kasthuriarachchi]

Dear all,

I have configure the qmail server on Gentoo Systems as your Guide  in Gentoo Docs. and I'm able to send a mails my own domain users only. but i need to send mails to outside domain. so i configure the mail client's smtp authenication by puting user name and password. but error will coming as follows.

553 sorry that domain isn't in my list of allowed rcphosts(#5.7.1 :25)

Please help me how to setup smtp outgoing authentication.

thanks.