- Plesk for Linux
- Plesk Anti-spam tools are used like:
- Despite this fact, incoming spam messages are still delivered to a mailbox.
Not optimized spam filter.
Decrease Spam filter sensitivity and check if the number of uncaught spam emails decreases.
If it does not, decrease the sensitivity further. If, on the other hand, legitimate mail gets tagged as spam, you need to increase the sensitivity.
For additional information, please refer to Plesk Documentation
Also, train SpamAssassin according to the article How to train SpamAssassin?