While there's no definitive list of 'spam trigger words' that guarantee an email will be flagged as spam, the consensus is that using overly aggressive, salesy, deceptive, or misleading language in subject lines and from addresses can negatively impact email deliverability and engagement. Modern spam filters utilize complex algorithms and machine learning to analyze various factors beyond just keywords, including content quality, sender reputation, and recipient engagement. Therefore, authenticity, relevance, and building trust with recipients are crucial for successful email marketing.