Computers Can't Spot Spearphishes
Antivirus programs and firewalls cannot detect spearphishing emails. Period. Only you and your colleagues, if properly trained, can detect spearphishing emails. If a user is not able to differentiate a regular email from a spearphishing emails, and he clicks on a link in the email, he will put your network at risk. Computers can’t detect spearphishes, they can’t report them to you, and they can’t automatically block them.