If you give me the message-id, I can take a look. In general, we fall on the side of sending duplicates on failure, instead of trying to implement two-phase commits across services, with the expectation that the receiving service will de-dupe the messages.
It's not clear from the above if that was a failure, or if the domain has their forwarding rules set up wrong, though being about 5 minutes apart is a good indication that there was a failure and a retry. Brandon On Thu, Aug 4, 2016 at 9:11 AM, Paul Smith <[email protected]> wrote: > A customer of a customer of ours has mail going to their gmail account, > which is then being forwarded to an address at our customer. They've > received duplicate copies of several messages. Looking at the Received: > headers, the duplication appears to be happening inside Google's network. > > Any idea of anyone I can contact to report this problem? > > Example headers below: > > > Copy 1: > > > Received: by mail-io0-f200.google.com with SMTP id m130so366952293ioa.1 > for <sales@ourcustomer>; Tue, 02 Aug 2016 03:40:05 -0700 (PDT) > X-Gm-Message-State: AEkooutAmkPM+4XcLSYQygb09cczqR > iavFDUFh/bzmDbAlblguIGxacHC+3fQFJASVWjzp/2+7jeo7KNxyeSOwxX8B > XfCkFmGEyELaDGa2HI4azd9vTk9F9xaYe0QWl0a+pE+FrdvBDRc6ubwrxOR1 > asPvHvy6JZHCrvHBivDMFKQkPciMbUHPFMQdLTsuVK315GmHLgMXsNHDhN > X-Received: by 10.202.182.85 with SMTP id g82mr37593538oif.58.1470134404 > 193; > Tue, 02 Aug 2016 03:40:04 -0700 (PDT) > X-Received: by 10.202.182.85 with SMTP id g82mr37590191oif.58.1470134335 > 013; > Tue, 02 Aug 2016 03:38:55 -0700 (PDT) > Received: from rs225.mailgun.us (rs225.mailgun.us. [209.61.151.225]) > by mx.google.com with ESMTPS id c131si912789oif.197.2016.08.02 > .03.38.42 > for <our customer's customer> > (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); > Tue, 02 Aug 2016 03:38:54 -0700 (PDT) > > Copy 2: > > Received: by mail-it0-f71.google.com with SMTP id i64so92748946ith.1 > for <sales@ourcustomer>; Tue, 02 Aug 2016 03:45:02 -0700 (PDT) > X-Gm-Message-State: AEkooutyS96zzzSIvOSsX9IOTOObxC > iX2s1IqcheDJP+BpstrNGi82wtzV/b5Gmu/tAUX8O1aiGFdbi7ffU7nJznmg > /MYp81OycErDP4iGkxF7fpwAG86nRuzlNQOEBOQsHgzgdRtx/cizhtoj2Uea > SQSOjL3I3kGfRASlYbWgrtmfKD9B6onkFqv/2Clq7LkDStMk+eX4ob6YDO > X-Received: by 10.202.182.85 with SMTP id g82mr37608097oif.58.1470134701 > 320; > Tue, 02 Aug 2016 03:45:01 -0700 (PDT) > X-Received: by 10.202.182.85 with SMTP id g82mr37590191oif.58.1470134335 > 013; > Tue, 02 Aug 2016 03:38:55 -0700 (PDT) > Received: from rs225.mailgun.us (rs225.mailgun.us. [209.61.151.225]) > by mx.google.com with ESMTPS id c131si912789oif.197.2016.08.02 > .03.38.42 > for <our customer's customer> > (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); > Tue, 02 Aug 2016 03:38:54 -0700 (PDT) > > > > _______________________________________________ > mailop mailing list > [email protected] > https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop >
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