Create filtering rules to improve the anti-SPAM mechanism
Allow the user to define expressions or words in the subject or body of the message that would classify the email as SPAM. For example: if a rule was created that classifies as SPAM every email that has the word 'OFFER' in the subject.
Just blacklisting by email / domain is not enough, because SPAMERS change domains very easily.
Thank you for your input. We will consider this functionality in upcoming releases if it is popular. Everyone, please continue voting for this feature if you consider it important.