 Spam training in enough?
You have english as mother language. Most of the filters have been studied for that language, so works very well. It is very different when you receive the most part of your messages in another language... In my experience, Zimbra SA have failed a lot expecially with phishing messages translted into italian. These messages are not recognized by Clamav as a threat, so simply pass the filter. The great adventage to have a lot of check is a big differece in score between valid messages and spam. |