Sometimes you need to add some compilance filter rule in order to allow or block some emails coming from an account and even if the account is in the compilance filter rule the email is still been caught by filter or not blocked, why?
1: You must to check the email header to verify wich is the true account and you can find it into the line called X-antispameurope-sender
2: For example if I want to block this account email@example.com as you can see this account is the display account that you can see into your inbox but sometimes it is not the true sender account
3: Go to CP panel and select the email and open the header
4: Search for X-antispameurope-sender and shows firstname.lastname@example.org this is the true sender account.
5: Once We know the true account We can create the compilance filter adding this account as a sender account and tag as clean or reject whatever you need to do will apply to this account.
Remember that you can use Regex variables to add a more wide email address/domain, that can include even random numbers/letters.