Hugh E Cruickshank wrote: > From: Frank Cox Sent: April 9, 2008 20:01 > >> On Wed, 09 Apr 2008 19:54:28 -0700 >> Hugh E Cruickshank <hugh at 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. >> > > I agree whole heartedly that it "should just work" but time and time > again we have see where it does not work. > > >> 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. >> > > That would work if I was looking to use a specific IP address but > would like to use a specific host name. For example I would like > all mail outbound to example.com to bypass the DNS/MX entry of > mail.example.com and use instead backupmx.isp.com not just the IP > Address of backupmx.isp.com. > > Thanks muchly for your suggestion. > > Regards, Hugh > > Hi, It has been some time since I have had to do anything with Sendmail like this, but I believe mailertable is what you need. See http://www.sendmail.org/m4/mailertables.html Hope this helps :)