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"Wanna" ransomware outbreak. Please see this Sophos article sophos.com/kb/126733 for advice on how to protect your organization. Immediate action recommended.
PureMessage for UNIX makes use of the Sieve language to implement message scanning. Message tests and actions are configured in the policy script (policy.siv), which is run by the PureMessage Milter. The Milter both runs the policy script and interacts with sendmail. Among the filtering tasks that can be configured are:
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