--- /dev/null
+# -*- mode: spamassassin -*-
+# This file includes rules to blacklist known bad relays
+
+# don 2012-01-30
+header RCVDDOTMAILER received =~ /dotmailer\.(co\.uk|com|org|net)/i
+describe RCVDDOTMAILER Sent via dotmailer
+score RCVDDOTMAILER 5