On Wed, Mar 01, 2006 at 07:19:18PM -0500, Chris wrote: > Hello. Basic sendmail question. > > I want to set up a backup mx server to field incoming mail when my > primary mail server goes down. I understand how to do this from a DNS > standpoint, but what I don't know is what should be in my > sendmail.mc/sendmail.cf file for this. > > Is there anything special I need to do for this? Anyone know any good > documentation?
Backup MX is a relic and a legacy. It breaks almost all spam filters. Modern mail infrastructure doesn't need it, except in rare cases. Save your other mailhost the trouble of dealing with all the double bounces and just skip it.
