Yesterday most of the mail administrators, organizations, and MSPs worldwide suddenly found that their mail was being rejected as it reported as being listed in the blacklist at bl.spamcop.net. SpamCop, a wholly-owned subsidiary of Cisco Systems, provides a Real-time Blackhole List (RBL) that mail servers can use to determine if incoming mail should be marked as […]

A few days ago, Microsoft® informed that a Mimecast® for Microsoft 365™ certificate has been hacked and is being used against Mimecast’s customers. This certificate allows full administrative access to the Microsoft 365™ Exchange Web Services of some Mimecast’s customers, estimated to be around 10% of their global install base, who had configured the integration […]