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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.
Issue You see the error 'Invalid recipient' when receiving email for a new Exchange email address.Sophos product and version PureMessage for Microsoft Exchange 3.0.0 Operating system Windows 2003 SP2
Technical Information This can occur when you add a new user to Exchange/Active Directory and Active Directory synchronization has not yet occurred.
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