Spam domain blacklist

Search and browse domains that have been identified as sending spam by IsEmailSpam through public blocklist data, disposable-email data, and user-submitted spam reports.

Use the blacklist to check the reputation of a domain before trusting an email, clicking a link, or responding to a suspicious sender. Select a domain below to view its spam reputation and when it was first identified. Looking for a specific sender? Use our Domain Blacklist Checker to check a sender's domain, or use our Email Spam Checker to check an individual email address.