That's very unusual, it sounds like a setting on their server. It's been a long time, but I remember a setting on old sendmail servers that would send an "advisory message" if an email had been sitting in the queue too long. It was just a "by the way" notice (and it always confused every user who received it), saying the server had failed to deliver the message so far but it would continue trying for X hours. Maybe something like that is happening here -- the message is being stopped by graylisting but the remote server doesn't retry it very often, so it sits in the queue long enough to send a warning to the user? I suppose you could fix it by either reducing the overall graylisting time on your server or by turning off graylisting for messages from their domain (using a configuration directory).
-- Sam Clippinger On Aug 18, 2017, at 11:24 AM, Quinn Comendant via spamdyke-users <spamdyke-users@spamdyke.org> wrote: > A client using our Spamdyke-enabled mail server has reported someone sending > them an email received a "bounce" message notifying the sender that the > messages has been graylisted (see the delivery failure notification below). > They did receive the message (graylisting works well for us). > > This is the first time I've heard of a soft failure resulting in a > notification returning to the sender. If graylisting is a common practice, > these notifications must be terribly annoying, however the sender (from the > cdph.ca.gov network) seems surprised by the message. So either: A) > graylisting is not very common, or B) cdph.ca.gov has an uncommon setup that > sends annoying bounce messages. > > If graylisting will result in annoying senders with delivery failure > notifications, I'd prefer to avoid that by disabling graylisting (doesn't > matter who is to blame, what the RFCs say, etc). > > What do y'all think? > > Regards, > Quinn > > The delivery failure notification received: > >> Hi Barb and Steph - >> >> When the email below went out yesterday, the following message was received: >> >> redac...@clientdomain.org... >> Deferred: 421 Your address has been graylisted. Try again later. >> >> redac...@clientdomain.org... >> Deferred: 421 Your address has been graylisted. Try again later. >> >> Patricia <redac...@cdph.ca.gov> >> Care Operations Advisor >> Office of AIDS >> California Department of Public Health > _______________________________________________ > spamdyke-users mailing list > spamdyke-users@spamdyke.org > http://www.spamdyke.org/mailman/listinfo/spamdyke-users
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