Blacklist not working

Hi all I am running version 9.2.2157 (5b49542)
I keep adding email addresses and domains to my blacklist but still keep getting emails from the blacklisted accounts. Any ideas?

The purpose of the Blacklist is to move new unread messages arriving in your Inbox matching the address or domain, to the Junk folder.

So you will still receive the messages, but if they are new and unread, they will be moved to Junk.

If it is not working, maybe the email address of the sender has changed. That is typical with spammers. The best solution for spam is to open webmail, select the message there and mark it as spam. Your server will learn from that and hopefully similar messages will be moved directly to Junk in future.