Hi there, not sure what the correct protocol for answering these things is, but here goes so at least you know it has been resolved.
After looking at the logs myself from the shell of the Sophos UTM, the UTM was in fact Greylisting. Why Sophos did not originally spot this when I raised the call with them I do not know. Also, why is it only affecting Hotmail/Gmail/Outlok.com, I do not know. Anyway, so the emails are following the right MX records in the right order. They are getting Greylisted and are arriving at the 3rd priority MX record queuing service (which does not Greylist) and are being delivered back up to the primary MX record. So all behaving as expected, well, kind of, but at least I know why. Thank you for all your suggestions, they helped me identify and understand the problem with a bit of digging on my part. Kind Regards, Adrian. _______________________________________________ mailop mailing list [email protected] https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
