This feature replaces any html links in email messages with a redirect that takes the user through a warning page. It only does this for urls' which it doesn't recognize and are not from friends:
g_phish_block "true" # Enables the feature
g_phish_only "user@xyz.com,user2@xya.xom" # only apply to some users (for testing)
g_phish_local "true" # apply replacement to locally sent messages
g_phish_friends "true" # apply replacement to msgs from friends (not normally good)
g_phish_key "secretxxxxx" # Used to verify redirect urls, if you set this never change it or old redirects will fail.