Content filtering evaluates message text, HTML, links, and attachments for spam patterns: deceptive phrasing, URL shorteners, image-only bodies, mismatched link text, and known malicious domains.
Are spam trigger words still a thing?
Much less than a decade ago. Modern filters are statistical and reputation-weighted. Deceptive intent matters more than any single word.
Why does spam filter content triggers matter for deliverability?
Reputation dominates, but content still tips borderline decisions and drives the complaints that build reputation in the first place.
What is the first step to get started with spam filter content triggers?
Keep a healthy text-to-image ratio and always include a plain-text part.
What is the most common spam filter content triggers mistake?
Image-only emails.