When it comes to security- what worked yesterday won’t necessarily work today.
Traditional antivirus and antispam protection are becoming obsolete. As with all things, as tools are made more sophisticated, so are the cybercriminals. Bad actors are putting real money into buying SSL certificates to make their URL’s appear to represent legitimate entities. Traditional protection won’t be able to go deep enough to detect this. Services need to be able to decrypt the SSL.
You can’t afford to let your guard down. To protect yourself and your company assets, you need to update your defenses using capabilities such as NextGen-AV or OpenDNS. These protections will enhance your security profile.