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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?

Thanks. V urgent
2 Solutions
Hi baileytibbs,

Do you know which list? If they are a "regular" spam list party then there must be something on their website to get in contact with them,
Most likely cause of being there is that you are a victim of a revers NDR spam attack, there are plenty of articles explaining the subject.


You normally need to contact the admins of the list you are on and have them remove your IP.

baileytibbsAuthor Commented:
Thank you both for answering so quickly.  I will follow the advice from Microsoft and contact the organisations suggested on the rbl pages.

Many thanks again
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