Charles Marcus:
> On 2013-07-31 1:23 PM, wie...@porcupine.org (Wietse Venema)
> <wie...@porcupine.org (Wietse Venema)> wrote:
> > That*is* a problem. Postfix will slow down and eventually hang
> > up when a client sends too many commands that cause an error
> > reply (as in VERY with a non-existent recipient).
> >
> > To make this robust the verified MUST disconnect after each probe.
>
> When you say 'the verifieD MUST disconnect...', I'm assuming you meant
> 'verifieR' - meaning, their server, the one connecting to mine sending
> VRFY probes?
Yes. Even when the verifier sends only known recipients, Postfix
will limit the number of VRFY commands that can be sent in succession
(that's why the verifier must also hang up after success).
That limit (smtpd_junk_command_limit) is configurable, but the same
limit applies to all clients.
Wietse
