Hi @Gabriele Maoret - SERSIS ,
Thank you for your question.
The purpose of email classification is to group messages into different types. Not all unwanted email is necessarily spam; some messages may instead be considered graymail, such as newsletters, promotions, or other mail that is legitimate but may not be important to the recipient.
SpamFoo attempts to place messages into the most appropriate classification bucket. These classifications can then be used within SmarterMail to organize, sort, and filter your email.
To learn more about how SpamFoo determines a message’s classification, open the three-dot menu in the Webmail section and select About Classifications. This provides additional information about each classification and how messages are categorized. Below is a screenshot of that dialog.
The current limit of four classifications is a limitation within SpamFoo, not within SmarterMail itself. Expanding the available classifications would likely require SpamFoo’s models to be trained to recognize the additional categories, although there may be other implementation approaches available to their development team.
I hope this helps clarify how the classification system works.
Kind regards,
Software Developer
SmarterTools Inc.