I do not need a solution (just sharing information)
Just raising awareness of a new (free!) white paper from Symantec Security Response!
The latest ISTR special report, Email Threats 2017, casts a light on a threat landscape where attackers are actively spreading malicious threats, BEC scams, and a variety of spam through email.
Full white paper: https://www.symantec.com/content/dam/symantec/docs/security-center/white-papers/istr-email-threats-2017-en.pdf
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