dovecot - Mar 2010 - outgoing mails

Hello,
I need to restrict outgoing email.
I am using RedHat CentOS 4.7 and Dovecot 0.99.11
Today all users can send emails to Internet.
But some people should only be able to send email to other user in this mail
server.
Just a few persons can send emails to the Internet.
How can I do that? 
THANKS!
Hugo

On 2010-03-25 2:22 PM, Ing. Hugo Ruiz de Huidobro wrote:
> I am using RedHat CentOS 4.7 and Dovecot 0.99.11 Today all users can
> send emails to Internet. But some people should only be able to send
> email to other user in this mail server.
> Just a few persons can send emails to the Internet. How can I do
> that?
Well, first, that is an *ancient* dovecot version, so don't expect much
(if any) support for it... but...

Your problem is not dovecot related. This is an MTA issue, so, whatever
you use for *sending* messages is where you need to be looking...
postfix, probably?

-- 

Best regards,

Charles