On Mon, Jan 27, 2014 at 02:30:24PM -0800, Quanah Gibson-Mount wrote: > >I agree that we hold off on new mechanisms until a need exists. > >Equal-preference A records should solve 90% of the problem. By not > >solving the remaining 10% at great effort, we can spend the limited > >development cycles more wisely. > > Thanks! I'll propose Round Robin DNS or load balancers as the > solution then. Overall, it would be most effective (for Zimbra) to > have it prefer the user's "home" mailstore and then fall back if > that wasn't available, but that would be tricky to implement > anywhere in the stack (but more closely aligns with LDAP URLs).
Actually, that is not too difficult. Just specify a round-robin name as the "lmtp_fallback_relay" (new feature). While adding SRV support is tricky, adding "lmtp_fallback_relay" is I think quite simple. -- Viktor.