Marc Perkel wrote:
Graham Murray wrote:
Because some senders erroneously treat a tempfail as a permfail (or even
worse as a successful delivery) and do not retry.
If that were the case then they already would have failed before getting
to tarbaby as your main server is out. If they are on tarbaby then they
already retried to get there.
tempfail != timeout
If the main servers are down or otherwise not responding, the sender
won't get a tempfail from those servers. So even if the sender is
broken enough to treat a tempfail as a permfail, it will still fall back
to the next MX until it gets to one that *does* respond. And if that
happens to respond with a tempfail...
--
Kelson Vibber
SpeedGate Communications <www.speed.net>
