SpamAssassin will show this yes, but maybe the host is using different plugins.
Spamassasin might be used secondary to a primary scanner like Mailscanner (spamassassin rules can be used to scan mail which is scored inside it). Recommending you touch base with your host to check how their email flow is set up.
Mailscanner has black/white listing options for the end user on Direct Admin itself.
Generally you would see something like MSFE (Which means Mail Scanner Front End) which would indicate your hosting provider is paying for more advanced scanning capabilities