Victor Duchovni wrote:
On Mon, Nov 08, 2010 at 08:43:07PM +0100, Ralf Hildebrandt wrote:
The fallback relays MUST be loop-free. Thus machine4 must NOT forward
back to machine1.
I was assuming that at least one machine CAN send mail :)
Your assumption is unwarranted, and fails to take into account the
possibility of remote failures, that result in mail looping between the
backup machines, while a remote destination is down.
If the receiving server is temp down, the message will continue to relay
to each defined relay as fast as the servers are able to process the
message and then the last queues it? Would this be an issue for bulk
mailers, etc...? I could not find more granular documentation which
states that a message may be retried or where options could be configured.
