Hi , The connection between Postfix and the archive is over SMTP.
In my example with the smtpd_milter, will the email also go to the hold queue if only one archive connection is down? Or will it deliver the email to the archive which is online? This is an important question for me, to get both in sync. If the emails will go in the HOLD queue, that is not really a problem for me. Our monitoring will scream within a few minutes, the mailq is too big and the connection to the archive is down. This way we are noticed to take action, keep the emails on HOLD till the problem is solved with the archive or take another action if the problem is severe and take too long too solve. We can always copy the data from one archive to another. This again raise the question if the emails will go to the HOLD queue too if one archive is down. regards, Roland On Wed, Oct 23, 2013 at 4:02 PM, Wietse Venema <wie...@porcupine.org> wrote: > Roland de Lepper: > > Hi Wietse, > > > > Thanks for the reply. > > > > What about milter_default_action = quarantine ? > > As documented, this leaves the message in the "hold" queue. If the > Milter should have done something with the message, then those > things will never happen. The message is now in the queue, and the > Milter is a before-queue feature. > > If I may ask, is the archive connected over SMTP or over a > propietary protocol? > > I think that "defer accepting mail while the archive is down" is > the safest option (i.e. leave it up to the sender to retry). > Everything else requires that the message is queued in Postfix while > the archive is down, for example as in this simplified picture: > > network -> smtpd -> queue -> smtp -> smtpd+milter -> queue -> delivery > agents > > The part with "smtp -> smtpd+milter: would implement an SMTP-based > empty after-queue filter. > > Wietse > > > regards, > > > > Roland de Lepper > > > > > > On Wed, Oct 23, 2013 at 1:24 PM, Wietse Venema <wie...@porcupine.org> > wrote: > > > > > Roland de Lepper: > > > > smtpd_milters = inet:81.x.x.x:8092 inet:217.x.x.x:8092 > > > > milter_default_action = tempfail > > > > milter_connect_timeout = 10s > > > > > > > > This works perfectly without any problems. the question raised, what > if > > > the > > > > connection between the mailserver and location B is down. Is the > email > > > > > > As documented no mail is delivered after Milter failure. The Postfix > > > SMTP server will reply with an error status code (4xx) and the > > > client will have to send the message again. > > > > > > The bad alternative is "milter_default_action = accept", which means > > > that mail will be delivered but not archived. > > > > > > If you want both mail delivered AND mail archived, then you need > > > to use sender_bcc_maps or recipient_bcc_maps to add recipients for > > > archival purposes. > > > > > > Then, Postfix will do the retrying until the message is too old, > > > at which time it will be returned to the sender. > > > > > > Wietse > > > >
