Andrei Rolando León Salas wrote:

Hello how are u, im having a little problem. i use the webmin to install automatly postfix, in the other server works, but in this now says.

Error while checking current Postfix configuration. Please manually fix Postfix configuration.

postfix: fatal: file /etc/postfix/main.cf: parameter mail_owner: unknown user name value: postfix

Manually edit the Postfix configuration file.https://mercadeoeficaz-cr.com:10000/postfix/edit_manual.cgi

i dont know what to do, can u help me please

You need to learn something about what you're doing.

For one, how did webmin install postfix? If from a tarball, then there's a bunch of stuff to do. If, on the other hand, you'd done it the *right* way, with a yum install, the scripts in the package would have created the user and group postfix.

mark