Re: [CentOS] Force sendmail outbound routing for specific domain name

On Wed, 09 Apr 2008 19:54:28 -0700 Hugh E Cruickshank hugh@forsoft.com wrote:

Is it possible to force sendmail to use a specified host name for outbound email to a selected domain name instead of the host name that can be found by looking up the DNS entry?

I'm not entirely sure that I understand your problem. If you have a unique domain name, and your client also has a unique domain name, and your dns records are properly configured, then sending email from domain name A to domain name B should just work, regardless of how close your actual IP addresses are.

Having said that, you can put a domain name and IP address in /etc/hosts on the originating computer and that computer will henceforth use the IP address specified there.