Email from a company can be white listed on SpamAssassin

Go on Cpanel. Click on Email/Spam Filters

SpamAs filter set up

 

Click on Show Additional Configurations and follow the screenshots below:

white list

Set up white list

white list rules

domain white list

Add to white list in *.website.com format, e.g *websitename.com (for all users from a website) or customeremailaddress@websitename.com (for individual users only)

SpamAssassin white list

Click save and the email from that address will be white listed.