On Tue, Jul 25, 2017 at 09:02:17PM -0400, Kevin A. McGrail wrote: > On 7/25/2017 8:48 PM, /dev/rob0 wrote: > >I am curious, what kind of logic do you have to determine that a > >spamming client might be a backscatterer? Are you talking about a > >custom policy service, or a milter? > > For the record, I can agree to disagree as I respect and understand > your position. I just choose to do it differently and think others > should as well. > > But yes, I use a milter. I am a fanboy of MIMEDefang. > > For example, in his case, I have a REDIS backend and would store > message IDs if I give a 5xx. Then if I see the same message id > retried, you could do the 2xx+silent discard.
Ah, okay. It seems we are looking at this from totally different angles. My rejections are pre-DATA, so there is no Message-ID to record. I would still be curious to know (back to what the OP was asking) if this strategy of accept+discard is actually making the zombies go away ... I wouldn't think so. But this is probably not all that relevant to Postfix, at this point. -- http://rob0.nodns4.us/ Offlist GMX mail is seen only if "/dev/rob0" is in the Subject:
