What IP(s) are you sending from? Not promising anything but I might be able to dig in to the data and see if anything useful can be found related to your sends.
On Fri, 31 May 2019 at 08:25, Simplelists - Andrew Beverley via mailop < mailop@mailop.org> wrote: > Hi, > > Does anyone have any contacts at cox.net please? We are seeing 452 > error code CXMXRT when trying to deliver (meaning "The email sender has > exceeded the maximum number of sent email allowed"), despite throttling > delivery down to 1 email every 12 seconds. > > Many thanks, > > Andy > > _______________________________________________ > mailop mailing list > mailop@mailop.org > https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop >
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