Spam filters use a variety of techniques to identify and block spam emails. Some of the key methods include:
Link Density: If an email contains an unusually high number of links relative to the amount of text, it may be flagged as spam. Blacklisted URLs: Links pointing to domains known for spam activities are automatically considered suspicious. Content Analysis: Filters analyze the content of the email for common spam phrases and patterns. Recipient Interaction: Emails that are frequently deleted without being read or marked as spam by recipients can influence future deliverability.