While SpamAssassin remains a functional tool for identifying potential spam indicators and analyzing email content, its relevance for modern email deliverability is limited. Modern email providers such as Gmail and Yahoo rely on more sophisticated algorithms that consider sender reputation, email authentication (SPF, DKIM, DMARC), user engagement, and list hygiene as primary factors for determining inbox placement. SpamAssassin scores should be seen as a starting point or one component of a broader deliverability strategy, not the sole determinant of email success. Furthermore, a small number of recipients use SpamAssassin and even scores across different versions can vary wildly.