On Tue, May 30, 2023 at 04:07:32PM +0200, Benny Pedersen via Postfix-users
wrote:
> > There's no good reason to have mail sent to mx2 unless mx1 is down.
Under the proviso that "mx1" is the mail store. The mail has to go
there anyway, so it may as well get there in one hop. "Load balancing"
in this scenario just adds unnecessary work. The primary will still
have to receive the message.
Only if both systems are configured to perform particularly expensive
anti-spam/anti-virus processing that is absent in the relay hop
from secondary to primary, does "load-balancing" potentially share
the CPU cost.
> and subject says load balancing, not backup mx
Yes, but is the request wise?
> imho OP asked not to have mx backup, but load balancing, in with case
> HA-Proxy would help more
The right answer is the one for the question the OP should have asked.
--
Viktor.
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