we have several servers which handle incoming smtp-connections as a
loadbalancing-setup, which also make use of the ratelimit-database.
one main disadvantage is, that you had to multiply the rate by the
number of hosts in the setup.
is it possible to share the ratelimit-hints-database across several
hosts - e.g. by NFS? are there some pitfalls, especially when the
nodes are on high load/traffic?