On Mon, 2015-09-21 at 23:29 +0530, Manu Sabu wrote: > On Mon, Sep 21, 2015 at 8:20 PM, Jon Gerdes <[email protected]> > 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 -- ## List details at https://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
