Spam check tools use various algorithms and databases to analyze your emails. They typically evaluate:
Content: Scanning for spammy words, excessive punctuation, and risky links. HTML Code: Checking for broken tags, large images, and improper formatting. Sender Information: Verifying the sender's domain and IP address against known blacklists. Engagement Metrics: Analyzing past email engagement rates such as opens, clicks, and unsubscribes.