At least 463,546 malicious URLs contained in the 28.4 million analyzed emails made it through to corporate in-boxes in Q4 of 2018. SAN FRANCISCO: Business emails laced with malicious URLs in the message body have spiked by more than 125 percent in Q4 2018 in comparison with the quarter before. According to Mimecast’s latest Email Security Risk Assessment (ESRA) report, released at the RSA Conferen