migrate_connections_between_sibling_domains — optimize connections for sibling domains
migrate_connections_between_sibling_domains = true
When this option is
false, if the active queue for a binding/domain pair becomes empty, its existing connection(s) sit idle. When set to
true, Momentum attempts to find a sibling domain which shares the same binding and has a non-empty active queue and then move the idle connections to it.
If two domains have at least one common mail server (MX), they are considered siblings.
The default value for this option is
migrate_connections_between_sibling_domains is valid in the global scope.