A SpamAssassin 'try it' message from mail-tester.com indicates that a URL within your email has triggered the URI_TRY_3LD rule or similar rules designed to identify potentially suspicious URLs based on patterns commonly found in spam. This doesn't necessarily mean the literal phrase 'try it' is present. The URI_TRY_3LD rule flags URLs that contain 'try', 'start', 'get', etc., in the hostname's third-level domain. SpamAssassin assigns a score to different email characteristics, and these flags contribute to the overall score. While it can affect inbox placement, a single flag doesn't guarantee your email will go to spam; it's one factor among many and can sometimes be a false positive. Email providers can customize SpamAssassin configurations, affecting the impact of specific rules. Therefore, focus on deliverability best practices: legitimate URLs, proper authentication (SPF, DKIM, DMARC), list hygiene, engaging content, and building a good sender reputation, rather than obsessing over specific trigger words.