Kojm,

Although there is no way to filter them out, there is work-around. You can specify an upper-bound for score in the quarantine report. For example, if this value is set at 400, you increase the score for Blacklisted TLDs filter to above 400. This way the report will only show messages below 400 and these emails won't be part of that.

Go to Server Configuration, Advanced Tab and specify a value for Max Score For Reports to specify this upper limit.

BTW, the quarantine reports are sorted by score. Therefore, you can ask your users to just look at first few entries and ignore the ones with higher scores.