You should look to using sanesecurity shelter signature.
I.e. shelter.ldb Regards Brent Clark On 2019/04/11 11:31, Benoit Panizzon wrote:
Hi List Our Mail Infrastructure just got hit by a new sextortion wave originating from vairous IP @ AS14061 I wondered, aren't there any RBL providers blacklisting whole AS ip ranges or returning the AS number when queried with the reversed IP, so blocking / penalizing could be easily implemented in SpamAssassin and other mail filters using RBL DNS queries? A quick google search did not return any useful hits on that topic. Mit freundlichen Grüssen -Benoît Panizzon-
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