How to scan incoming e-mails using a business rule E-Mail Client

Hi Guys,

Happy New Year.

New Year, ney ideas.
I'm running SFOS V16 Home Edition and eveything is working so far.
Now I want to setup up E-Mail protection and created a business rule using E-Mail Client template.

In my testing I set source and destination to ANY,
Malware scanning is enable for everything.

Is it required to do some changes on my client computer, like to import a certificate?
I'm not running a mail server, I only try to access my ISP Mail server with Outlook 2016 or Thunderbird Mail.

any advice and suggestions will be greatly appreciated

Karl