Somehow our exchange server has got itself onto "known spammer" lists.
I don't know why but since late last week a lot of our emails are being returned with messages suggesting that our organisation is on a known spammers lists. I have checked that we are not allowing open mail relay on our exchange server and the tests I undertook suggest that everything is OK.
However, my main concern is to get us off these lists. Does anybody know how this is done?
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