Anti Spam's BypassedSenderDomains

Hi,

I have a customer whose domain is abc.com.
I set abc.com as BypassedSenderDomains in ContentFilterConfig and BypassedSenderDomains in SenderIDConfig but they still not able to send emails to our domain users.
Their emails will go into the Quarantine Mailbox.

I thought used BypassedSenderDomains so avoid customers' emails being blocked or quarantine.

Can anyone help me? thanks.