Open source & free under the GNU General Public License (GPL).
Block phishing email on SMTP, IMAP, and POP.
Blocks malicious 'pharming' websites.
Event log of phish caught.
Reports show how many fraud emails were stopped, who they were targeting, and from where they were sent.
Untangle Forums: Phish Blocker
Untangle Wiki: Phish Blocker
Phish Blocker is an intelligent email filter that identifies phishing attacks - email containing fraudulent links or information stealing code. Phish Blocker can scan any email transferred using SMTP, POP or IMAP. It leverages ClamAV's signature engine as well as a separate signature database complied from multiple sources to protect your users.