Multiple server in transport file

[Alex Broens]

On 5/16/2008 9:41 PM, Gregory Wong wrote:
> Hi everyone. I am starting to relay for a domain that uses multiple
> front end mail servers to accept mail mainly for redundancy purposes.
> In the transport file, the domains I am relaying for are currently
> setup like this:
> 
> domain.com smtp:[mx1.domain.com]
> 
> If I wanted to enter more than one mail server for domain.com, how do
> I do it? If its not possible does anyone else have any workarounds?

you can do it using DNS roundrobin

rrobin.domain.com  1.2.3.4
rrobin.domain.com  5.6.7.8
rrobin.domain.com  4.3.2.1
etc

where
1.2.3.4 = mx1.domain.com
5.6.7.8 = mx2.domain.com
4.3.2.1 = mx3.domain.com
etc

domain.com smtp:[rrobin.domain.com]