Whitelist Senders for Workmail Junk Filter

Is there a possibility to whitelist senders für the aws junk mail filter? I have a legitimate sender (in my case it's PayPal informing me about activities in my account), that is always send to the junk folder. Workmail also doesn't seem to learn from me repeatedly moving these emails out of the junk into the inbox. What can I do? This is quite an inconvenience. Thanks for your help