DTNX Postmaster:
> >> 2013-07-31T10:48:39-04:00 myhost postfix-25/smtpd[17729]: lost connection 
> >> after VRFY from smtp446.redcondor.net[208.80.204.46]

Not a real problem...

> > with occasional
> > 
> >> 2013-07-31T10:46:28-04:00 myhost postfix-25/smtpd[17993]: too many errors 
> >> after VRFY from smtp644.redcondor.net[208.80.206.44]

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.

        Wietse

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