We have the paid version of Untangle Spam Blocker - Phish blocker doesn't really seem to do anything. Out of about 30000 messages scanned, it filtered out 7 - all of them were Hilton Hotel advertising emails.
In the meantime we have gotten a lot of phishing emails, and one person almost fell for one today. There aren't any settings so I am not sure how I can change how anything is configured