Recently, we have noticed an increase in unwanted emails attached to infected documents. These are things you can do on your Plesk and cPanel control panels
But I still reinstate that local protection on your computers and devices like smartphones are extremely important. Most malware remains inactive until users intervention. Thus, these protections are your last defense.
For Plesk, I suggest you buy the extension known as Premium anti-virus. After you have obtained the addon license you need to install through your ‘updates & upgrades’. The add-on license is not too expensive and it is worthy especially you are in business and many mailboxes.
For cPanel, installing ClamAV is a must. However, if you are running a VPS with a Gb memory or below, you might want to think twice as ClamAV uses resources especially during updates ad you have plenty of emails.
You can enhance the ClamAV by using 3rd party rules, but again you will need memory. The next solution you might want to consider is the MailScanner from Configserver. I recommend the Front-End costs USD 55, one-tine fee for its license. Useful and it makes your jobs so much easier.