Attila Nagy:
> I've only written this, because I was sure that somebody would miss it.
> This destination is not slow because of slow delivery times on the
> already open connections, but because of connection timeouts (I can
> observe this on other, mostly silent systems, which send only few
> messages there) and artificial limits on the recipient side.
> I'm aware of this, and we are always trying to make that better, but
> what I would like to know is why does postfix behaves this way.
> This is a built-in DoS feature, which could be easily solved, or I miss
> something?
Perhaps you have a suggestion for how Postfix would decide which
of thousands of queue files contain a recipient in a slow or fast
domain. Remember, one message may have any number of recipients,
not just one, and all this needs to be accomplished while using a
finite amount of memory, and in a manner that allows fast recovery
from crash (i.e. no global database state with information about
every message and receipient).
Wietse
