Blocks Spam from your Inbox. Spam Blackout is safe and easy-to-use. Powerful Spam Filtering Engine. Works with Any Email Client Program e.g. Ms Outlook etc. Downloads from Hotmail, POP3 & IMAP. Spam Filters include Internet BlackList lookup for known spammers, Friends/Enemy List, Bayesian Analysis, Regular Spam Expressions, Email Attachment Filter, option to strip all HTML & Attachments from Emails. The Email Viewer is Virus Proof.