On Tue, 2004-03-09 at 12:17 -0600, Greg Hewgill wrote:
Sending bounces for messages that have been unconditionally accepted by your
backup MX servers may not be a good idea.
It's absolutely _not_ a good idea. That's why the acceptance by the
backup MX servers is so conditional. If it were unconditional, that
would be bad.
That's why I said my backup MX servers operate a content-checking policy
which is at least as strict as the target domains' servers, and perform
recipient verification callouts so that the only time they may accept a
mail which eventually gets rejected is if the primary is _actually_
uncontactable at the time and we receive a mail for a bogus address
which isn't a cached negative.
--
dwmw2