Read the original article at https://blog.knowbe4.com/engineered-to-evade-how-phishing-attacks-are-designed-to-get-through-your-secure-email-gateway
Getting through secure email gateways (SEGs) is simply the cost of doing business for a cybercriminal. Literally, detection at the perimeter by a SEG is the same as falling at the first hurdle.
Read the original article at https://blog.knowbe4.com/engineered-to-evade-how-phishing-attacks-are-designed-to-get-through-your-secure-email-gateway