On Wed, Feb 23, 2011 at 01:09:24PM -0600, Noel Jones wrote: > For the same destination, postfix will remember a dead host across multiple > messages, and not retry a known dead host for a period of time.
No. Postfix remembers dead destinations, not dead hosts. When a live
destination is served by hosts a subset of which are down, demand
connection caching kicks in under load and reduces the frequency
of (probabilistically slow) connection attempts.
--
Viktor.
