virtual_transport to many lmtp loadbalancers

[Jan-Frode Myklebust]

I would like to point postfix' virtual_transport at several addresses
for lmtp delivery, and hopefully want postfix to gracefully handle that
any one of them might be down. 

        virtual_transport = lmtp:loadbalancers.example.com:24

What's the best way of doing that? Will simple rr-dns work:

        $ host loadbalancers
        loadbalancers.example.com has address 192.168.42.17
        loadbalancers.example.com has address 192.168.42.15

or will MX records better ?


  -jf