On Mon, 2015-09-21 at 23:29 +0530, Manu Sabu wrote:
> On Mon, Sep 21, 2015 at 8:20 PM, Jon Gerdes <gerdesj@???>
> wrote:
> On Mon, 2015-09-21 at 08:55 +0530, Manu Sabu wrote:
> > Hi,
> >
> > I've an email server and I want to configure one domain on
> this server only
> > can sent emails to email accounts under the same domain.
> That is domain.
> > Com can only sent email to domain. Com. How it can be set up
> >
> >
> > --
> > *---*
> > *Warm Regards,*
> >
> > *Manu SabuSystem Engineer*
> What kind of mail system is domain.com using? We need more
> information.
>
> Cheers
> Jon
>
>
> We are running a cpanel linux system.
(Please put your reply below mine)
A little more information would be helpful ...
It has been years since I used cPanel. Let's start here:
https://documentation.cpanel.net/display/ALD/Exim+Configuration+Manager
and it looks like you will need to use the Advanced Editor.
I think you want to add an additional rcpt acl. Find the line that
reads:
acl_smtp_rcpt = <something>
this tells you what the rcpt acl is actually called (probably:
acl_check_rcpt)
Now find:
------------8<---------------
begin acl
...... some stuff ......
acl_check_rcpt:
------------8<---------------
Somewhere near the start of the rcpt acl add something like this:
deny sender_domains = example.co.uk
domains = !example.co.uk
message = No relay to external domains
log_message = Attempt to relay to external domain
This is a very simplistic approach because the sender domain is easily
faked.
Here is the full documentation:
http://www.exim.org/exim-html-current/doc/html/spec_html/ch-access_control_lists.html
You could use two ACLs here instead. One that looks for your internal
Dovecot/Courier daemon as well as the sender/recipient domains. The
second ACL tests for authenticated SMTP attempting to relay back out
again.
Cheers
Jon
Blueloop Ltd
01460 271055
https://www.blueloop.net
Blueloop House, Ilchester Road, YEOVIL, BA21 3AA Registered England & Wales - 3981322
